I'm a nondenominational Christian. I believe that every human only lives on Earth once and when they die, they either go to heaven or hell depending on their beliefs and remain in their destination forever.
But if reincarnation were a thing and I couldn't be a human, I'd want to be a great white shark so I can mindlessly tear living things to pieces and eat the remains. I won't have to worry about predators and I could swim very fast.