Noting the obvious: Awesome graphics, and a traditional if not Classis RPG that is Final Fantasy. Good music coupled with some good old action, and storyline (important of course) drives this game to be better than most RPG's out there by far. In the end, just watch out for sin, I mean Sin. It'll get you in the end..
The only thing you will be wondering after playing it, and seeing the next sequel being released is - I thought the one I just played was the final one? (but you eventually stop hating the fact that it is not the final one, and jump on the next one).