The end of FFX-2.

(SPOILER) I just wanted to see Yuna and Tidus end up together, not depending on the percentage I had achieved.

I felt that after playing the whole game through I deserved an ending I wanted to see. If I sat down and tried to get the right percentage for it in the first place the game wouldn't have been fun because I would have been trying to make sure I didn't miss anything, and not just casually playing, doing whatever I felt like. So I was just disappointed at it. ;_;