What if I don't WANT skills on my bar?

[Reliquia]

the bar is 30 slots, you can only equip 25 skills, put the ones you dont like on the bottom

This, there's also going to be 5 job related quests (30, 35, 40, 45 and 50). Even if each one would give you a job related ability you won't run into a problem where you can't fit all the allowed abilities on your bar.