Ohh, boy. Species preference when roleplaying. Welp, I'm definetely going to stick out with my reply.
In Feral Heart (when it comes to joining roleplays), I usually like going off as a cat. Warrior Cat, normal cat, house cat; whatever. I've familiarised myself with their behaviour, so I like showing those skills off, I guess. That and it's just what I'm the most comfortable with.
And on the other hand, I like going as a human. A human, humanoid, almost-human-robot; whatever. As long as it has opposable thumbs and isn't a monkey, I'm fine with it. The whole interest is a little ironic cause' this is an animal-based game with no humans whatsoever, but alongside my in-game preference it is also my general preference.
But walking around and meeting people, or joining roleplays? Cats. Cats are definitely for the win. Big cats, small cats, house cats; you name it. Cats are wonderful.