oh, you might want to try stellvia of the universe...
it's quite lovely and good, just get through the medicore start and you won't be able to stop...

if you want, you can check Maburaho, it's an echhi hermem anime, you might like the style or not, but it was entertaining for me... at most points

as I said before, Kare Kano and mahou tsukai no koto (avaliable in OGM format) are greatly recomanded as well, espicially Kare Kano.