My laptop hasn't had stickers since a CTO asked why mine didn't have any stickers like the ones on the laptops of his cool cloud team. Personally I've found laptop stickers bad taste since then.
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We sell back our laptop to the company we get them from, they refurb them and give us a nice discount on the new model. Most vinyl stickers leave a mark on MacBooks that can't come off, hurting the resell value a lot. Some have protecting covers on their laptop and the stickers go on that instead.