When you want to play, they want to be alone. They expect you to cater to their every whim. They leave hair everywhere. They drive you nuts and cost an arm and a leg. Cats are tiny women in little fur coats.
Dogs lie around all day, sprawled on the most comfortable piece of furniture in the house.
They can hear a package of food opening half a block away, but don't hear you when you're in the same room. They can look dumb and lovable all at the same time. They growl when they are not happy. When you want to play, they want to play. They are great at begging.