I've long thought that if I died and came back as an animal, I'd want to be a crocodile. Not only have they survived several mass extinctions as a species, but they've also managed to survive humans, even becoming menaces and nuisances to them. And doing all that while spending most of your time floating or basking with no natural predators? That's a good life.
A few factoids: the word crocodile comes from the Ancient Greek word: (crocodilos). Also, unlike other reptiles, they have a cerebral cortex and a four-chambered heart. Unfortunately, they are unable to stick out their tongues, since said tongue is kept in place by a thin membrane. They have to rely exclusively on their glare to convey the contempt they feel for you.