Through my years of mmo and rpg gaming I've tended to swing between the two extremes of the warrior/wizard dynamic.
Some days I just want to be a dumb tank in full armor soaking up hits and acting as a wall for squishier classes. But then there's days where I love being a glass cannon that can kill something in 1-2 nukes but a strong breeze can kill me.
The least fun I've head with a class was as a healer druid in Everquest. Something so stressful about the party relying on you for heals and if you wipe it's generally your fault. idk how people dedicate themselves to a class like that.
It totally depends on the Genre. In diablo style games I go for the kitey shooty usually bow/crossbow class. In tab targeting games its always a heal over time class. In more TTRPG inspired games I love rogues. In party based games I love whatever class lets me stack the most buffs. Thats just the crunch though.
Overall I love druidic vibes. The class fantasy of nature fighting back is too juicy for me. There is something so wholesome about murdering corrupt priests/kings with pagan power. My go to class in just about every game is a wood elf druid.
The druid class hall in WoW Legion is a perfect representation for why I love them so much. Its just this perfect lil grove and someone wants to corrupt it. Stopping them is the simplest strongest motivation for me.