Cats are the most useless animals in the world, aloof and distant and they wreak havoc with my sinuses.
They kill rodents -- lots of rodents (birds, too). Although they usually don't eat what they kill, at least not the ones in my neighborhood, as these semi-domestic cats don't need to hunt for survival. I always see them hunting for pray in my yard at all times of the day. Other than that, they suck. They spray, shit and keep me up at night. Plus I have to disposable the rotting carcasses of dead rodents on a week-to-week basis, but it's better than them living in my home.
"You will lose." -Ivan Drago