Hmm Yuki has always been my favorite character, I liked seeing her as a normal girl. and not until around the last scene did I imagine it was Yuki who was responsible for altering the world. Up until then I thought it was Asakura who was responsible and looking back I don't see how that would've been possible. That's all I have for now until I properly gather my thought xP
Another thing, the scene where Kyon is talking to himself about his decision to stay in the alternate universe or not was just great.