Cats>Dogs. Do not get me wrong, I love dogs and all (I love my dog to pieces) but I have better experiences with cats. Most dogs, after a while, tend to dislike me for no apparent reason...

Also it might be the fact that when I am older, and if I live alone, then I want to be a creepy old man living in an old house that all the kids think is haunted, surrounded by a sea of felines...