Just out of interest is there any hentai games where the main character you play as is a girl? (X-change was kind of like that.)
i think "Requiem Hurts" is a game where you play as girl oo..
Here's a few that I can remember:
AGA - all girl's squad
Chain - at least half the time.
La blue girls - old pc98 game
Almost all games that have a Yuri theme
Can't remmember but did Des Blood 4 had 1st stage female character?
Well, Ringout Lesbians is a good game where you are a girl and off course theres a lot of lesbian action
The EVE games.
If you're looking for straight scenes, Yin Yang is like X-Change and has a little of both. I think there are some older ones like Amy's Fantasies and Marble Cooking. Tetsuwan Gatchu! is a fighting game with mostly female characters. For yuri games, try Fermions or Saphism no Gensou.
Check this, was recently torrented thanks to frashart and Anri, check the second page for the torrent.
Virgin Snow Ura
Looks nice, I gonna download it after play BR2...
I'm surprised no one's mentioned EVE Burst Error. Technically you play from both the guy's and the girl's POV, switching between either at leisure, but there's a classic for you. C's Ware.