As long as it isn't even remotely human/ is barely human-like, I love trying all of the classes/ archetypes, and developing racial customs and forging new identities for monstrous races through said classes.
A pacifist holy minotaur, for example. Or a Gnoll monk, who has perverted the learned disciplines and martial arts. Or a lizard man/Asabis, who prefers human finery in all it's forms, and has become a scribe of ancient battles and combat styles.
Mind you, I'm talking tabletop/D&D roleplay. In videogames, I usually play a warrior type first, then really tuck in with a ranged/wizard type. But I still try to play something as far from human as possible!