For me, the best girl is definitely Itsuki. :D She has a great combination of feminine and boyish traits and a sexy mix of dominant and submissive tendencies. While I admit that she is quite mean to Asuka much of the time, IMO her teasing is much more good-natured than Sakuya's coldness or Nao's manipulation.

I also think Itsuki is the kindest of the girls (except maybe Kaede). She helps Asuka in all the routes. Even in the Sakuya route when Itsuki gets dumped, she takes it well - completely unlike Sakuya in the Itsuki route.

I don't like Sakuya. She's arrogant, condescending and domineering, and worst of all she is violent, hitting both Itsuki and Asuka. The only scene where I really liked her was the swimming ring scene on the beach.

Nao is cute and also very intelligent and capable, albeit a bit annoying. Her cruelty towards Asuka on the roof during the Nao route is horrifying, though.

Kaede I'm not so attracted to, but she is very kind and good person, and I respect her very much for that.

For me it's Itsuki all the way. :D Even her bad ending is my favourite of the bad endings because it's just so twisted. And her good ending (apart from Sakuya's part in it) is both heartwarming and sexy. :)

What are your reasons for loving your favourite girl?