Cats are higher up than dogs on the useless scale for the fact that you don't have to pick up after them, they don't drool everywhere, don't have breath that smells like ass from 6 feet away, and generally don't act retarded and spastic or feel the need to be insecure and bark endlessly at shit 10 times their size from behind a protective screen.
I like cats, probably more than dogs for the above reasons, but I can't have either. My stuff is far too expensive for a $50 animal to piss on or puncture with a claw. And I refuse to imprison or modify an animal to suite my own needs.
Tried having a kitten once, but it laser focused on the *one* thing it couldn't have even after providing a taller more inviting cat tree; my Definitive Tech BP3000TL speakers, 6' high covered in a cloth "sock". And it knew two. Let it into the room, it would look at you, look at the speakers, slowly inch over, then BAM straight up mad dash with dialated pupils... ex had to give it to her parents, we weren't having that. Not at all.