These are my favorite J-dramas:

My Boss my hero

Legal High

Nodame Cantabile

the memorandum of kyoko okitegami

Gokusen

GTO

I don't mind if there is action or romance but it must have comedy! Thankyou! :)

Nobunaga Concierto
Gogh The staryy night
Yankee-kun to Megane-chan
Yamada-kun to 7-nin no Majo
Ouran High School Host Club
Switch Girl
Thanks for the recommendations! I will check these dramas out later. :)