From my point of view, no stories are really "new", ever. They're a cocktail of stuff we've heard in some way or another - family drama, romance, culture clashes, daddy issues, etc. When I say 'fanservice', what I mean is that all the events in X lines up so neatly for kids to like. There's two teenagers who act like they're in their late 20's, there's that old dude we all like, there's that dumb dude who doesn't understand anything because he's religious, and they're all pretty much Mary Sues (except for that old dude who learned his lesson; obviously, because he's missing an arm and an eye.) There's different cultures and races and shit and we have to put them in because if we don't it's not Final Fantasy, but all we bother doing is mentioning some strange things they do because they're Of A Different Culture, which doesn't give them personality or life at all.
It just bothers me. They set up a really nice machina vs gods thing but failed to make it interesting because they made Wakka easy to misunderstand and Rikku too smart, which really makes her very uninteresting. They needed to balance her out with something which isn't there.
My opinion, which is very much an opinion and probably needs a fact check. X) Maybe if I played the game again I'd pick up more of the story, and I know I'm being unfair towards many... no, all of the characters. There's probably a lot to be said for XII's characters too, but at least the teenagers act like teenagers. I fucking love how they made Vaan that dumb. Makes him a lot more lovable (and realistic!) in my eyes.
But then again I come from a country where we love Donald more than Mickey, because he is such a major fail.