I like the fact that you can potentially get massive XP boosts if you know what you're doing, such as:

- staying at the Royal Suite in Altissia.
- imbuing your spells with XP bonuses(yes, that's a thing)
- eating food that increases your XP bonus

At one point recently, I managed to get around 400k XP at the end of a run, and pushed all my characters past level 85 or so. And I still have some hunts to do before the endgame.