Cat person. Cats are low-maintenance, have unique and often hilarious personalities, groom themselves well, are small enough to fit in your lap, and can do badass things like run along fences and catch birds out of the air.
Dogs, on the other hand, require constant attention, walks and playing fetch, are way too eager to please, are incredibly loud, do monumentally stupid things like run down the middle of the street and fall into holes they can't get out of, and they consistently smell like shit. Essentially, dogs are like babies, except without the cuteness and the potential to grow up to be intelligent, well-rounded people. They're utterly not worth the effort.