Some cats do smell, they can be noisy, they can make a mess of their food (ever seen a cat "kill" kibble?), poop on the comforter (or rug), look at rodents in disgust ("Eww...what's that? You expect *me* to take care of that?), meow to be let out ten times a day.
Also, a cat won't bury the evidence, unless *you* are the evidence. :-)
![](http://sphotos-a.xx.fbcdn.net/hphotos-snc6/c99.0.403.403/p403x403/246720_365299636880462_307619403_n.jpg)
:-)