So what classes do you never see yourself playing and why?
For me, it would be Priests. Never really a fan of the whole Priest lore in MMOs. I've never seen a cool Priest and they have 2 healing specs (not very interested in healing) and are stuck with only 1 DPS option.
Don't have anything against the class itself, but the way they play is just not for me.
Honorable mention: Rogue because they are stuck with 3 melee specs. I like variety. They're not as bad as Priests for me because at least they have fun and unique ways to use stealth/vanish and stuff. But I'd rather just play a Feral which has most of their kit and 3 other completely different specs for variety.