I noticed that the "Powered by Windows XP" sticker on my ThinkPad was similarly shiny as the surround of my Audi shift gate, so I transferred it there. Not as sexy as Ford's Sync, and AFAIK there isn't a line of MS code in my Audi, but it gives it that "I hacked my car" wannabe-cred.
I love all stickers like the ones I get (sometimes) on my math tests. I wish I had more stickers to put everywhere, on my case, on people, on my forehead, etc. I was disappointed that I only got 2 stickers on my first build a year ago: processor and mobo. In the future I will only buy a component that explicitly says "sticker included."
I do, but only because they're provided with the CPU and the motherboard. They are a bragging emblem for those who have relatively new processors and a thing of shame later on when they are outdated. Nevertheless I wear my mark of shame with pride!
Not me because they always fall off and leave a sticky residue. But my GF has put Hello Kitty stickers (those puffy plastic kind) on most of our electronics. I don't really care that much since she usually covers over the manufacturer's logos (which I could also give a rat's ass about).
When I was in high school, my family and I never put our stickers on our cpu chassis, but instead on nearly all of our appliances. It made for some pretty frightening mornings when I would groggily go to the kitchen for some coffee, notice an out of place pentium III sticker on the microwave, and freak out that I was in the wrong room, holding a coffee cup full of something that was not coffee...
All the stickers on my case are what my system actually has (AMD, EVGA, Corsair, ASUS) but my old laptop I took the stickers that came with all my car parts and slapped them on it (PasswordJDM, AEM, H&R, Exedy Racing Clutches).
I avoid stickers on my personal Builds. Only stickers I have are on my vehicles that say "Powered by American Made Bio-Diesel" and yes I run Bio Diesel in all my vehicles. But not because I am some tree-hugger, more because it allows me to know that I am not funding terrorists and supporting American Oil independence.