*spoiler*
Tough call, but I'd have to say story wise- FFX takes the prize. It had a bit of everything really. A famous, rather arrogant, blitzballer with an inferiority complex regarding his father getting taken to a new land and watching him develop was done amazingly. The supporting characters had their unique personalities and contributed to the story of the game.
Perhaps the defining moment of the game was that kiss that Yuna and Tidus shared. I loved how Tidus was telling her about all the things they could do once she completed her pilgrimage. He was so excited about all of the fun they would have- but Yuna broke down in tears knowing that she couldn't quit her journey. That aspect of unobtainable love was just epic.







