Just the amount of level grinding and item farming I always put myself through in order to have the best magic as early as I know how to get it... within certain levels of patience anyway.

Lord knows I'm never doing Lionheart so early in the game again; the earliest I've done it is disc 2, and even that was a total bore.

The only actual section I don't like is the final Laguna dream sequence. Zzzzzzz...