VI is overrated... there, I said it. Kefka is great, and I love the general setting of the world, but overall... I dunno. It's a good game, but the more I think about it, I rank VII, IX, XII, and IV ahead of it, easily. I'd like to play the Playstation release, though, as I heard the graphics upgrade was phenomenal.
But Kefka... wow. Not even gonna try and explain his awesomeness. Just... wow.