Someone made this challenge on polish community so I decided to take it on :D I thought maybe someone here will be interested so I translated it into English. 
Who's gonna do it with me? :D
I'm currently watching Healer, Kill Me Heal Me, Hyde Jekyll and Me and Heart To Heart and thinking to put it under 4, 29, 6, 10 (but I might change that :D)
1. Drama based on manga
2. Drama without 'wall-kisses' 
3. Drama with homosexuals 
4. Drama without love triangle
5. School drama 
6. Drama in which female lead is not poor
7. Drama with noona romance 
8. Drama in which the lead actor (or actress) was also the lead actor in your first drama 
9. Supernatural drama 
10. Drama in which someone commited a suicide 
11. Drama without happy ending 
12. Mini drama 
13. Historical drama 
14. Drama with bromance 
15. Drama from top 10 on mydramalist.com or similiar site 
16. Drama which you know from fanvideos 
17. Drama you've started but never finished 
18. Drama that everybody but you like 
19. Chinese drama 
20. Japanese drama 
21. Taiwanese drama 
22. Drama with North Korea episode 
23. Drama recommended by friend 
24. Another version of drama you've already seen 
25. Drama with Kim Kwang Kyu 
26. Drama with Kim Mi Kyung 
27. Drama in which leads fell in love while being young and met after years 
28. Drama made before 2000 
29. Drama with white actor or actress 
30. Drama with at least 2 idols 
31. Drama in which both leads' parents are alive 
32. Drama without hateful mother 
33. Law drama 
34. Medical drama 
35. Tokusatsu
I think that even without trying I would hit a lot of these so why not. :'D

Some random comments on this and that:
1) Webtoons count, right? Cheese in the Trap will be a must watch (and the there will be Orange Marmalade but I might not watch...)
2) Wall-kiss? Huh. I'm not sure if it means what I think it means.
7) I will be watching all the noona romances I can!
8) Atashinchi no Danshi... Apparently everyone is considered a main actor in this drama's cast (as per MDL), huh... so not so problematic as it could be then. I bet I could even watch a 2015 drama then.
10) Tough one. Can't think of anything.
11) I want to see a drama like this so badly. Just need to find one... (Actually 'Platonic' should get the last episode subbed soon and... I think it might end like this... Maybe~)
12) I wonder if there'll be anything good this year... I'm basically waiting for "White Christmas 2". No high expectations or anything.
17) I have a lot to choose from, lol. :D
18) I have a lot to choose from, boo. :(
22) Eh. Which dramas do NK episodes?
25-26) Love these two. I want new dramas with them~
28) I'm sure I'll find a good Japanese drama from pre-2000. I saw 'Over Time' a while ago: loved it.
29) I wonder if we'll see some of the Abnormal Summit guys soon in dramaland.  Maybe not...
30) I've got this - Perseverance, Goo Hae Ra!
35) Ah, this one will be really difficult for me. I don't even know any.
@Fira for 22 you can watch Doctor Stranger if you haven't. I've seen this last year and don't know any other NK dramas so it will be tough point for me haha

As for 'wall-kiss' I translated it roughly from Polish so I don't know if it's correct but it means kiss when they only touch lips and the world is spinning and you know. not like real kiss at all :D for example: https://www.youtube.com/watch?v=5eAwYmSyWnI
^ Oh right, I had forgotten about Doctor Stranger. As an afterthought, Spy should be something like this too...

Definitely not the kind of wall-kiss I was thinking of then. :'DD But I got it now~
Does it need to be a 2015 drama ?
i'm also in. i will get back to this when i've completed the list. 
same question as HasegawaYui. does it have to be a 2015 drama? can it be a drama i've completed in 2015?
i'm not sure if i can categorize Kill Me, Heal Me with #3 because of Ahn Yo Na. hehe
That looks fun !!! I'm in !
I also have my personnal 2015 challenge on my profile, if anyone's interested.

Also, can a drama be put under more than one category ?
I'm in

I'd also like to attempt yours Juniko. 
Cool ! I'll have partners in both my challenges ^^
Right, time to start listing (before I completely forget what goes where!). I'll try to get one drama to each category but at this point I'm putting the same dramas under many categories since I'm having trouble deciding which goes where~ I'll edit this post later when I have more dramas to add.

1. Drama based on manga
2. Drama without 'wall-kisses'
3. Drama with homosexuals 
- Sunao ni Narenakute
- Last Friends
4. Drama without love triangle
- Summer Snow
- Persevere, Goo Hae Ra
5. School drama 
- School 2015 Who Are You
6. Drama in which female lead is not poor
- Falling in Love with Soon Jung
7. Drama with noona romance 
- 9 Ends 2 Out
8. Drama in which the lead actor (or actress) was also the lead actor in your first drama 
9. Supernatural drama 
- Oh My Ghost
10. Drama in which someone commited a suicide 
- Sunao ni Narenakute
11. Drama without happy ending 
- Cheap Love
- Summer Snow
12. Mini drama 
13. Historical drama 
-
14. Drama with bromance 
- Falling in Love with Soon Jung
- Share House no Koibito
15. Drama from top 10 on mydramalist.com or similiar site 
16. Drama which you know from fanvideos 
17. Drama you've started but never finished 
- Platonic
18. Drama that everybody but you like 
19. Chinese drama 
20. Japanese drama
- Sunao ni Narenakute
- Cheap Love
- Summer Snow
- Last Friends
21. Taiwanese drama 
22. Drama with North Korea episode 
23. Drama recommended by friend 
24. Another version of drama you've already seen 
- The Time We Were Not in Love
25. Drama with Kim Kwang Kyu 
26. Drama with Kim Mi Kyung 
27. Drama in which leads fell in love while being young and met after years
- Valid Love (kinda?)
- Hogu's Love
28. Drama made before 2000 
- Cheap Love (1999)
29. Drama with white actor or actress 
30. Drama with at least 2 idols 
- Persevere, Goo Hae Ra
31. Drama in which both leads' parents are alive 
32. Drama without hateful mother 
- Unkind Women
33. Law drama 
34. Medical drama 
35. Tokusatsu
I'll also try, becouse I'll see quite dfferent dramas - not only romcom and action.


What does it mean "wall-kiss"?

24 - I don't think I'll do this, becouse it's like reading book after watching the movie. It's boring

34 - I hate medical movies/books/tv series :P it's impossible to watch it :D
I'll try it. Completed 18/35


1. Drama based on manga: The Girl Who Sees Scents (completed in May 2015)
2. Drama without 'wall-kisses': Mask (completed in July 2015)
3. Drama with homosexuals: The Lover (completed in June 2015)
4. Drama without love triangle: You're All Surrounded (completed in January 2015)
5. School drama: Vampire Flower (completed in February 2015)
6. Drama in which female lead is not poor: Ugly Alert (completed in March 2015)
7. Drama with noona romance: Oh! My Lady
8. Drama in which the lead actress was also the lead actor in your first drama: Pinocchio / Park Shin Hye in You're Beautiful (completed in January 2015)
9. Supernatural drama: Blade Man (completed in February 2015)
10. Drama in which someone commited a suicide: Yong Pal
11. Drama without happy ending: Vampire Prosecutor 2 (completed in February 2015)
12. Mini drama: Love Cells (completed in February 2015)
13. Historical drama: Jewel in the Palace (completed in January 2015)
14. Drama with bromance: Incomplete Life (completed in January 2015)
15. Drama from top 10 on mydramalist.com: Kill Me, Heal Me (completed in March 2015)
16. Drama which you know from fanvideos: Autumn's Concerto
17. Drama you've started but never finished: Hotaru no Hikari
18. Drama that everybody but you like: Full House
19. Chinese drama: Boss & Me
20. Japanese drama: Ouroboros
21. Taiwanese drama: Someone Like You
22. Drama with North Korea episode: Doctor Stranger
23. Drama recommended by friend: Who Are You
24. Another version of drama you've already seen: Full House - Thai
25. Drama with Kim Kwang Kyu: Warm and Cozy
26. Drama with Kim Mi Kyung: Healer (completed in February 2015)
27. Drama in which leads fell in love while being young and met after years: Come! Jang Bo Ri (completed in January 2015)
28. Drama made before 2000: Sandglass
29. Drama with white actor or actress: Save the Family
30. Drama with at least 2 idols: EXO Next Door
31. Drama in which both leads' parents are alive: All About My Mom
32. Drama without hateful mother: Mr. Back (completed in March 2015)
33. Law drama: Prosecutor Princess
34. Medical drama: Blood (completed in April 2015)
35. Thai Drama: Leh Nangfah (completed in June 2015)
* I’ve replaced 35. Tokusatsu with Thai Drama, because I will never watch a Tokusatsu, or at last not this year.
Sounds good!! I'm in :P  20/35

1. Drama based on manga - Mirai Nikki
2. Drama without 'wall-kisses' -
3. Drama with homosexuals -
4. Drama without love triangle - Orange Days
5. School drama - Gakkou no Kaidan
6. Drama in which female lead is not poor - Shiritsu Bakaleya Koukou
7. Drama with noona romance -
8. Drama in which the lead actor (or actress) was also the lead actor in your first drama - (not gonna happen, my first drama was Playful Kiss)
9. Supernatural drama - Orthros no Inu
10. Drama in which someone commited a suicide - MARS
11. Drama without happy ending - God's Gift
12. Mini drama - Vacation
13. Historical drama - Nobunaga Concerto 
14. Drama with bromance -
15. Drama from top 10 on mydramalist.com or similiar site - 1 Litre of Tears
16. Drama which you know from fanvideos -  Marriage Not Dating
17. Drama you've started but never finished - Bad Guys
18. Drama that everybody but you like - Healer
19. Chinese drama -
20. Japanese drama - Maou
21. Taiwanese drama - They Kiss Again
22. Drama with North Korea episode - 
23. Drama recommended by friend - In Time With You
24. Another version of drama you've already seen - ISWAK
25. Drama with Kim Kwang Kyu -
26. Drama with Kim Mi Kyung  -
27. Drama in which leads fell in love while being young and met after years - Ex-Girlfriend Club fits, I think
28. Drama made before 2000 - Ice World
 29. Drama with white actor or actress -
30. Drama with at least 2 idols -
31. Drama in which both leads' parents are alive - Smile, You
32. Drama without hateful mother -
33. Law drama  -
34. Medical drama - 
35. Tokusatsu -