Dogs don't purr, and cats don't need constant attention.
Cats are cleaner and easier to look after
Mans best friend. They aren't stupid by running out of your house half the time like most cats, and want you all the time. Cats only want you if they're hungry.
Many people say that cats are cleaner, but that is not always true. I see cats sitting on dirty things and get themselves dirty. And I know they clean themselves with their tongues, but all the bacteria gets stuck in their tongue and sometimes, they fall sick.