Cats. So easily cats. The main argument against them is they don't really bring a lot to the table, but dogs are EXHAUSTING, so much higher maintenance. You have to feed them, walk them, pick up their crap while you're walking them, play with them, they're like children. And I hate children. Cats are elegant and mellow, they know they're in charge but they don't have to be all in your face about it :P