There are probably more than tens of Top Best Drama polls , and most of the time the result is the most popular ones , as many good dramas turn out to be not that popular as the idol dramas.
for now I want to create a large list possibly 300 Dramas (Asian dramas in general )
then anyone who have seen at least 10 dramas from the list down-vote (the worst) 1 drama to be excluded for the next voting
1st time voting ( 300->100) , 2nd voting (100->30) , last voting (30->10).  numbers are just example  might be different ,

Here is the list so far its at least 250 Dramas.
http://mydramalist.com/list/r1wXD0EL

The Point is
1. Name a few dramas that you think are masterpieces to be included in the poll
I will post another post after the list has enough dramas.
2. Vote for the worst drama in the list only if you have watched more than 10 Dramas on the list.
Interesting! Can't wait to see what other people say.
My masterpiece dramas would be Coffee Prince and Secret Garden.
How many dramas are on the list right now?
Signal, 49 days, White Christmas
I would add Pinocchio, Angry Mom, I Can Hear Your Voice, and It's Okay That's Love to the list.
Even though it's a list for asian dramas in general, only kdramas have been listed so far. :(

Masterpieces genre wise, IMO

Comedy: Hana Kimi
Family/Youth: Reply 1988
Psychological: White Christmas
Romance: Coffee Prince
Time Travel/Mystery: Nine
Tragedy: 1 Litre of Tears

If I were to vote for a Taiwanese drama, it'd be Mars probably.
Thanks eveyone For the replies. I made the list before this post and has about 250 Dramas , but still I need about 50 more to add , Everything so far mentioned is in the list.
I would add...

Action/Romance: Healer
Sci-Fi/Romance: You Who Came from the Stars
Historical/Action: Six Flying Dragons
Historical/Romance: Empress Ki
Thanks Ranie , I have added them on the list . 
A few more suggestions:

Suspense: BORDER; Bloody Monday
Friendship: Nobuta wo Produce
Psychological: LIAR GAME; Subete ga F ni Naru
Mystery: Biblia Koshodou no Jiken Techou
Romance: Love Shuffle
Time Travel: Nobunaga Concerto
General: dinner
Added (Biblia Koshodou no Jiken Techou , Dinner , Subete ga F ni Naru) ,the others are already on the list . thank you Railise 
Biblia +1
Love Shuffle +1
Nobunaga Concerto +1
Liar Game (J-ver.) +1

I was trying not to go overboard with the suggestions. I really wanted to add more XD

Psychological: Karamazov no Kyodai
Mystery: N no Tame ni
Business/Life: Misaeng
Melodrama: Secret
Music: Nodame Cantabile
Sci-Fi: Long Love Letter
Friendship: Orange Days & Shut Up
I appreciate your reccomendation and would like  you to list even more if you have them on your mind . Those far has been on the list you can see the list , I have provided the link in the topic post
Anyone More Recommendation ? 
Thanks For the Recommendations , I am working on the list to be prepared soon .