To add to this, I would love idle animations that have something to do with the class.
Melee classes can take their weapons out from time to time and inspect/polish them and maybe give them a little swing back and forth almost like testing the weight than putting it back.
Black Mages could create a fireball and juggle it around playing with it before extinguishing it in their hands.
Summoner's could summon a second Carbuncle of one of the colors that you're not currently using. They could chase each other around you and maybe climb up onto you before the new one vanishes and your normal one jumps off.
Every job could have its own flare. Something distinctly unique to that job's fantasy.
This emote could happen every 2 - 5 minutes. (Or give us a slider in the settings like the other idle animations)