Tsukihime is alright...I liked the main girl. Pretty charming.
Lilith's stuff is sick, but they hit you in the right spot and one ends up loving them. Well...most of them. (Ingrid best girl btw).
I played the Muv-Luv duology some years ago. Pretty solid. The animated sections in Alternative reminded me of Viper, although they were nowhere near as good as what Sogna used to do. The use of sprites was pretty good, though.