Being a Dik on steam is one with a surprising amount of heart. Katawa Shoujo is one you should be able to find for free somewhere, Something to Write About:Unbroken had a very good story and actually managed to make the main protagonist interesting (something a lot of AVN's fail at)
I am already play Being a Dik waiting for Season 3 on Stream (It's my first AVN I've play and really love it) and Unbroken is on my Wishlist for moment to buy it. I checked out the games I mentioned before, though only superficially, and the one I got to try was CrimsonHigh. I think it's a good game; the story is interesting and I think it would give a good feeling. Thanks a lot for the recommendation and the other games too.