I'm at the final boss of Super Mario RPG and can vouch for it being really fun. While it's not as epic in scale and story as Chrono Trigger, it's got good humorous writing, good pacing, and the difficulty is just right imo.
I also really like that if you lose a battle, the game resets you at your last save point and carries over any exp you gained, making grinding way less tedious.
Cilantro