I'm with Kim, I'd like to be one of my own cats. Boy, the life they lead. Food whenever, tidbits at dinner, in and out whenever they demand. Someone to scratch them whenever they want. Yeah, I'd be my own cat.
Of course, whales are cool and it's OK that they have a layer of blubber.
And if I could be a bird, it would be a hummingbird or a Red Tailed Hawk. They are both fascinating birds.