Gender benders

Nail shop paris lately.. secret garden, you're beautiful (Ikemen Desu Ne) , My bratty princess (I like thz :) ), Ouran High School Host Club, Sungkyunkwan Scandal... that came on top of my head. coffee prince, hamakimi, Mendol, Princess princess D , Mulan There z some Hongkong drama.. Idk the name exactly.. but sth like "Butterfly....." Lot on my yet to watch list.. so thz z what I got for now :)

The Tempest (Japan)
K-POP - The Ultimate Audition (Korea)
Butterfly Lovers (China)
Tiamo Chocolate (Taiwan)
Ma Boy (guy crossdressing as girl; Korea)
Boy and Girl (Taiwan)
Boku to Kanojo no XXX (boy and girl body swap; Japan)
Happy Michelin Kitchen (Taiwan)
Eternal Happiness (Hong Kong)
Fabulous Boys (Taiwan; remake of Korean drama You're Beautiful)
IS - Otoko Demo Onna Demo Nai Sei (Registered as female at birth but later raised as a boy (gender) since he always played with boys his age during the earlier years of school. Haru is forced to attend high school as a girl because of this; Japanese movie)
He's a woman, She's a Man (Hong Kong movie)
Dororo (Japanese movie)


The ones jaded14yaoi and Monsterz mentioned are also cross dressing:

Painter of the Wind
Mendol
Nail Shop Paris
Coffee Prince
Hana Kimi
Hana Kimi Remake
Secret Garden (body swap)
You're Beautiful
Ikemen Desu Ne (You're Beautiful remake; Japan)
Ouran Host Club
Sungkyunkwan Scandal
Princess Princess D (guys crossdress as girls)
Mulan (movie)
Coffee Prince
My Bratty Princess


You could also consider dramas where the main actor's sexuality is questioned:

Personal Taste (Korea)
Down With Love (Taiwan)

All of them are gathered in these threads I guess:

http://mydramalist.com/forum/showthread.php?1078-Gender-Bender-Dramas
http://mydramalist.com/forum/showthread.php?2020-A-girl-desguises-herself-as-a-boy!&highlight=gender+bender