Well it's been covered, but pretty much everything in FFX and FFX-2. To me, personally, the worst was Blitzball in FFX-2. I really liked Blitzball in FFX and couldn't wait to try the game in part two thinking that it would be an even deeper, more involved, challenging game, but well, we all know what I got instead. Closest I ever came to quitting the FF franchise. Srsly.