Why include Kingdom Hearts? it is a mostly Disney styled game, all that is Final Fantasy related in it is a few Final Fantasy characters, characters that really don't do much for the plot, Disney characters have that covered mostly so why include it in this? Also, this is the FINAL FANTASY forum, Kingdom Hearts isn't allowed to be spoken about in here unless it is to do with an actual Final Fantasy character in the game.
I've actually enjoyed all of the soundtracks pretty evenly, especially that of the XIII games.
I know a LOT of people hate XIII, but the OST and graphics are still undeniably good (kinda makes it more reason to dislike them knowing they wasted it on something less than great).