Korean Drama: Autumn in my heart
Taiwanese Drama: Meteor Garden
Japanese Drama: Hanayori Dango
If I remember correctly it was the Korean drama Bad Family.
JDrama - Absolute Boyfriend
KDrama - Boys Before Flowers
TDrama - MARS
CDrama - Love O2O (the only one I have watched, actually :P)
K-Drama: The heirs, Secret garden
T-Drama: Hayate the Combat Butler
J-Drama: Hana yori dango
C-Drama: Love 020
fated to love you in 2014
Korean: All About Eve
Japanese: Beautiful Life
Taiwan: Meteor Garden
China: Legend of Concubine Zhen Huan
Started watching around: 2009
J-Drama: Hana Kimi (2007) (-> My first Drama ever!)
K-Drama: Playful Kiss
T-Drama: Hana Kimi or Skip Beat! (I'm not sure)
C-Drama: Boss & Me (never completed it)
Kdrama: The Heirs
Cdrama: The Journey of Flower
kdrama ; you're beautiful.
jdrama ; binbo danshi.
thdrama ; hormones.
twdrama ; devil beside you.
cdrama ; love o2o. 
K-drama : Dae Jang Geum
Korean: Dream High
Japan :  Pride 
Thailand : Hormones season 1
Taiwanese : Devil Beside You 
Chinese : Secret Angel 
K-drama    : Full House
Th-drama  : Full House
Tw-drama  : Fated To Love You
j-drama      : Hana Kimi
C-drama    : Boss And Me
Korean: You're Beautiful
Thai: Sotus
Japanese: Switch Girl!!
Chinese: /

T.Drama: Skip Beat! (My 1st drama ever, I love the anime/manga)
K.Drama: Oh My Lady (Because Siwon was amazing in Skip Beat ;p )
J.Drama: Conan or Cat Street (I was "exploring" the Asian drama world)
C.Drama: The Mystic Nine (Because of Lay)
Korean: Descendants of the Sun
Chinese: Love O2O
Japanese: 1 Litre of Tears