BLM. I don't even play BLM that much anymore but I'm glad it exists. It's one of the few jobs that fits a playstyle of planning, mapping and treating the player like they have a working brain.
Otherwise I'm just not a fan of FF14 jobs. I'm not saying my opinions are correct, they're just opinions, but personally I find ff14 jobs too safe, bland, often a little clunky and rarely designed to excite the player or with fun in mind.
The base design is the long 2.5s GCD with oGCD's to weave between each GCD to artificially make it feel fast paced. That suffers for a start at any windows where you don't have oGCD's to press. Then every class follows this more or less. Every class has a 2 minute burst window. They get a bit similar to play.
I also don't like how ff14 has so many buttons with an impact you can't feel. They're just there to flesh out the rotation and fill it. Small oGCD's that hit for noodle damage individually or small buffs of 5% or 10% here and there. You don't feel them, you just have to try and remember they're contributing to that overall number that you're banned from seeing or knowing about.
Then class updates have been poorly designed. We're basically playing ShB classes with one button and a few traits and while I understand they don't want to reinvent the wheel each expansion, it's hard to play a job for 2 years and feel excited about the prospect of playing almost the exact same thing for another 2 years. Many of the new abilities were things like "button you can press after pressing your big cooldown" or "one new big cooldown".
I understand why they do it. It works and it's safe. I also don't think they have the manpower to be really creative. The class design team is literally 4-5 people, with 20 jobs and more every expansion. So they've created a safe job design where it follows a straightforward formula and they can just tweak potencies and make it appear balanced on paper. Maybe it's for the best with this company. But I don't have to love it and I can't help finding ff14 jobs boring.