Either a house cat or a dolphin.
I almost said dog, and then I remembered that people expect certain behaviors out of you. If you are an a**hole cat, people expect it of you.
I'd come back as a Kardashian. Not really! Just funnin! A bird would be nice because you could fly. I think, though, I'd settle on being a pampered house cat. My owner would dote on me even though I'd have an attitude a lot of the time, and my biggest concern would be finding the coziest spot to take a nap.
~ There'll be Chocolate, if God wills it. ~