A few years ago I even saw an Ad[1] from Apple itself showing a lot of Macbooks with different stickers their owners have pasted on it, depicting something on the line of : " the Macbooks are so much loved that people just can't resist to personalize them."

And I still miss the previous work Macbook that I put Portal video game sticker on. :)

[1] https://www.youtube.com/watch?v=ZT4ZbwgIK3w