Let's see some mount specific jobs:

Chocobo Knight gets bonuses and can fight from a Chocobo
Dragoon can ride a dragon/drake/wyvern (whatever version of the creature) and gets bonuses from when they use them to fight
Arcanist can fight on Magitec armor
Beastmaster could even have a specific mount they could get bonuses from when they fight with them


Of course don't limit the mounts to those jobs, but I would like to see benefits for certain jobs using certain mounts. It would be interesting to say the least.