Blue Mage
That job was absolutely beautiful, and wicked cool. It's interesting because our current action/ability system is very much like Blue Mage was in FFXI. In where we had a host of available spells, and limited amount of points to set these spells.

My favorite Job in the last year and half of my FFXI gaming became Dancer. That job was SO underappreciated and used, yet was so incredibly fun/helpful/effective. The reason why I didn't mention Dancer over BLU is because with the flexible class system, there's a little bit of Dancer built into every class in XIV right now.