Well ... some things i didnt like about X-2 was:
a. the background music
b. some of the missions were kinda boring
ehh there might be others but those are the main things ...

but the things that rocked:
a. the way you could change dresspheres
b. real Emotion ... 1000 Words
and there IS others i just can't think of any right now ...

but personally, i liked 10 better. but X-2 was pretty good.