My desk at work stays pretty neat. If it starts getting cluttered, I know I am too far behind and I need to get my butt in gear.
My desk at home is always a disaster. Right now I have piles of mail, papers from school, financial papers, my kids' school papers, books, CDs, various computer cables, and junk my kids set on my desk all laying here. It doesn't seem to deter the kitties from making themselves comfortable, though!