Final Fantasy X-2 is a good game with plenty of strange surprises.
Characters: Let's get this out of the way.
Yuna- I know it's wrong to judge the game on something like this, but this is probably the least favorite thing I have about the game. Yuna was changed just way too much. I understand that she would be a little more laidback with Rikku poisoning her mind, but that doesn't mean she has to wear such revealing clothes(But I do like her blue thingie that goes down her leg, I think it has a name..but I don't know what it is) It just didn't feel like Yuna. Yes, there was the good ol' Yuna still in there, and that was evident, but at first glance, it just seems so different. And who would ever expect Yuna to become a famous singer? That was unexpected.
Rikku- Basically the same, with more revealing clothes. I think a shirt would be warmer than a scarf.
Paine- I liked Paine, Yuna and Rikku needed someone like her to make things different.
Gameplay: The gameplay was pretty good in my opinion. The dressphere system was a nice change, even though I usually just used the original Gunner-Thief-Warrior when continuing the story.
Story- The story wasn't all that compelling. The whole sphere hunting thing was really random, but the Bevelle incident was pretty interesting. But most of it wasn't nearly as serious as FFX.
Sound- I liked the vocal music. 1000 words was great and Real Emotion was good.
Graphics- Similar to FFX, not too much change.
It's nice seeing the locations of FFX again, makes it feel more like a sequel. Obviously, there's plenty of changes, but it's still a pretty good game.