I've been doing PC Support for nearly 8 years, and I don't remove my stickers. The plastic protector is still on the top of my TPC, held on in a couple of places by tape (I shudder to think how ugly the top would look if I had removed the plastic shield). I put the Intel sticker on the PCs I build.
My computers are my babies. The stickers are analagous to the bows and headbands parents put on their bald baby daughters, or the blue hats they put on their sons. My baby is a little dressed up, too. Of course, I did have to lift the monitor to see if I even had any stickers. The Centrino and XP stickers will remain, and I will remain in IT.
I'm also not one of those purists who espouse the beauty and power of the command line. I demand command line, because I often need it, but I don't prefer it to GUI. Oh, yeah, and I don't hate Clippit.
Strangely enough, I refuse to put bumper stickers on my vehicles.
Do you think I might have better luck getting ssh running again on my Mandriva Linux box if I removed the XP sticker from my Tablet? :D