cats do suck.
My roommate and his girlfriend have 2.

I need to buy a new lint roller every month because there is so much &@#%ing hair all over the place.
Piss/crap box smells horrible always.
They act nice, then when you stop petting them they get pissed and start biting your hand. Like, maybe if my hand keeps getting bit I'll pet this piece of crap some more?
They only thing fun thing they do is chase a laser light and beat eachother up.
On the other hand, dogs (not small rat-like girly dogs) are pretty cool. Once you teach them to crap/piss outside. They do tricks, they don't bite/scratch you because they aren't douchebags. (although the licking does get old) Medium/large dogs > cats/cat-sized dogs