I've always wondered, are stickers on a programmers laptop looked down on in the software development industry? If you walk into a coffee shop to meet a potential developer for your project and he's sitting there with a sticker-coated laptop, do you second guess hiring her/him?
Do you want to work somewhere where stickers are frowned upon? I don't. That said, I prefer a clean laptop myself. (except for the scratches it's earned)