Narcissu was one of my first. Well, it wasn't ero but it was beautiful anyway... need to play it again sometime.
Then... Wanko to Kurasou, it was a very sweet game for starters. The final events for Mikan had me tearing up.
Majipuri - Wonder Cradle I also played. I was kinda fascinated by how the OP was animated back then. lol
Long break inbetween, then restarted up with Kisaragi Gold Star. Haven't actually finished it yet.
I got Zettai ★ Imouto Genri Shugi!! for obvious reasons, but having noticed there was a yandere route I just
had to go through it.
Bloody ending, crazed sister... dang.
Planned on going at fortissimo:Akkord//Bsusvier but seeing how there will be an expansion (yes, with voices!
) I might as well wait. Seriously though, the graphics and music really got me. From what I know the story's quite solid as well. I can already see it being awesome as an anime adaption.