If there is reincarnation, which I think there is cuz, I mean, then there are WAY too many souls hanging out and it must be so crowded and annoying to commute, plus the whole "Hmm...I feel like I've known you before" deal. But anyway, if we could choose an animal to become I would totally go with a cat.
Why?
Because then I could sleep for 16 hours a day and that would be normal. Plus claws, and night vision, and the ablility to fly. I mean hello!