Playing Final Fantasy 10 quite a bit recently, and I've decided a number of things:

1) Blitzball (the mini-game) should be released as a stand-alone game for PSP.
2) I need to think of a way to play Blitzball without holding my breath underwater for 15 minutes, or spending cash on oxygen tanks.

As you can see, I clearly think blitzball is the best mini-game EVER to come from the Final Fantasy series (Triple Triad comes a close second).