I think there should be a pair of relatively easy quests that at the end grants a JOB EMOTE and a JOB POSE.
The emotes would be simple, an action that they preform in their normal, like the way a PLD thrusts his shield forward during Bulwark, or the Jump animation for DRG. The pose would be a perpetual emote and would again mimic a job action, like the casting animation of a BLM, or the Fist of Fire pose on a MNK.
Moonfire has proven people will do quests for emotes that are fun, so why not more? You of course would only have to do the quests once, and the emotes would change as you change jobs.
EMOTE IDEAS
PLD - Bulwark
DRG - Jump
BRD - Shoot an arrow
WHM - Cast a spell
POSE IDEAS
PLD - Sword up as when using Oaths
WHM - Perpetual "Cleric Stance" pose
BLM - LB pose
AST - "Bubble" pose
DRK - Unleash pose
BRD - Plays harp