I certainly believe the title should go to FF as well. I mean...I adore Kingdom Hearts, but when you make a decision on there, it hardly affects a thing? The most you can do is heighten your strength/magic/defense. >.< You don't even get to choose what you say. (Except in the beginning of KH1, where you're saying what's most important to you, but it doesn't really affect you later on.)

Final Fantasy...with every choice alters your game play. That's a true RPG.