Warriors aren't exactly one of the most convoluted classes on Azeroth.
Mage roleplay has been ramping up over the past couple of expansions.
Hunter roleplay has never really been heavily focused on class -- mainly because the class as a whole didn't really have a ton of lore behind it.
Priests have been in the game since day one.
Everything that is, is alive.
They aren’t practitioners of flashy magic, architects of some grand, universal design, nor members of any kind of army set on defending the universe.
Paladins have always been warriors of the Holy Light.
Legion has a slightly different dynamic than any other expansion before it.
I’m a huge proponent of roleplaying whatever you want within the context of World of Warcraft.