I'm more of a dog person...i love both animals but cats have some attitude problem and oftentimes, I'm the one who has to instead of them LOL!
Well there is always a THIRD option, but in response to your question, I like both animals but I'm a cat person. Dogs crap everywhere, bark to much, and slober.. LOL (unless there are well trained). Cats to me are cleaner and they at least bury their crap.