First off: Everyone saying that they can't see a major difference between this and the original version MAY want to get their eyes checked. I played the SHIT out of the original back in the day, and I can say with certainty that there is definitely improvement from my perspective. But, moreover, this is going to be on a HANDHELD, not a full HD display. Get it in-hand, and I'm sure it'll look better than these brief shots of character models implys.
With that out of the way, let me just say: I'M THROWING MY MONEY AT THE SCREEN, BUT NOTHING IS HAPPENING!
...ahem, let me rephrase that. Final Fantasy X is my personal favorite in the series, and the chance to finally get to play it again sounds great to me.
I don't own a Vita, but with this and Persona 4 Golden, I think I just might splurg and finally buy one.
And finally, let me add this: Auron doesn't care if you think Tidus is whiny and Wakka is annoying. The only thing Auron cares about is kicking ass.