Cats! I find that cats give just the right amount of interaction to be a pet without the constant attention needing crush a dog gives. The lifestyle with a cat is way easier, I don't feel as guilty over time away as they aren't as upset over it. As long as my guys get a few pets a day they are tided over until a good snuggle session when I have the time. A dog will get destructive without attention, and make me feel terrible like I'm neglecting them. Cats are just easier.