Aesthetically, my favorite job is definitely Bard. I've always gravitated towards bow characters in RPGs and I love music, so Bard is a double win for me. I also really love how the Bards are able to play many instruments in game, even if I kinda suck at playing it manually. Honestly, playing instruments with Bard (and Soken's legendary Lahee) inspired me to try to learn piano irl and possibly pursue a music degree.
Gameplay-wise, I definitely enjoy playing Red Mage the most because of chain raising. I love saving runs by raising the healer so they can lb3 not just because it feels good, but also it can save me time that would have been wasted on wiping and resetting. Summoner also get's an honorable mention for having a raise and being a relaxing job to play.