J-drama: Hana Kimi (2007) first drama ever.
K-drama: durrr... Coffee Prince? Not certain, but I think so. I remember still being into the girl-disguised-as-boy genre from Hana Kimi.
TW-drama: Skip Beat!
C-drama: nope 
Thai/lakorn: nada
HK-drama: nill
J-drama: Hana Yori Dango
K-drama: don't remember
T-drama: don't remember
C-drama: Return of the condor heroes
Lakorn: Full House
H-K drama: Swipe Tap Love
K-Drama: You're Beautiful (First Ever Drama)
J- Drama: Ouran High School Host Club
Korean: You're beautiful
Japanese: Hana yori dango (first ever)
Taiwanese: Devil Beside You
Chinese: Scarlet Heart
Korean: Boys Over Flower (hmmm, memories)

Japan :  1 Litre Of Tears (At that time, I thought it was a series of movies, but it was actually a drama. I think that was my first drama ever, considering I didn't even know it was called drama. I was really really young that time. I remembered we still had the small tv back then when I watched this. Ok enough talk lol)

Chinese : When Love Walked In (Lol, Was curious bc Vic starred in it)

Still no Thai and Taiwanese dramas.
meteor garden, taiwanese version
Mars (TW) 
Hana Yori Dango (JP)
and then I started the best ones: Kdrama!
k- drama - school 2015 (first Drama ever)
j- drama - Hana Yori Dango

JDrama: Atsu-hime
KDrama: 49 Days
TwDrama: The Rose
CDrama: Scarlet Heart
Korean Drama : Playful Kiss
Thai Drama : Kiss Me
Japanese Drama : Piece
Chinese Drama : Love Me If You Dare
J-Drama: Hana Kimi (original)
K-Drama: Boys over flowers
Taiwanese: It started with a kiss
Chinese: Scarlet heart
Thai: Jam Loey Rak
Kdrama: Soulmate
Jdrama: Liar Game
Cdrama: Prince of Lan Ling
Tdrama: Sunshine Angel
Thai Drama: Ruk Sutrit
South Korean: Playful Kiss
Japanese :  Asuko March!
Thai : Full House Thai
Taiwanese : Just You
Chinese : Sealed with a Kiss