Cats. Dogs are my least favorite pets.
I don't get this. Where did the "cats are too lazy and dogs are too hyper" thing came from? It is not true, and if anything it depends on the breed. Some breeds of cats are playful, energetic, aggressive, loyal or loud and some breeds of dogs are elegant, calm, passive and polite.
It's not so much the behavior is the difference between the two animals, as there are cats who are like "dogs", and vice versa. It's more like their activity and their nature as a particular species. You don't call a boy a girl if he's weak and cowardly.