Here in the Asay home we have a growing problem: Each year we add a Mac to the fold, making it increasingly more difficult to tell them apart. My wife, eldest daughter, and I each have MacBook Pros. Soon, no doubt, my nine-year old son will get one. I love the way the Macs look, but it becomes a problem when they all look the same.
That's at home. Imagine, where we have scads of MacBook Pros.
Yes, we could litter the laptops with stickers, but that's a bit like sacrilege (though some disagree).
It's much easier in PC land, where various shades of ugliness help to distinguish criminally ugly Dells from nice-try Toshibas. ThinkPads are the only PCs worth buying, but they suffer from the same defect that MacBook Pros do: They all look the same.
Today this may not be an issue for you. But with the Mac poised to grab eight percent of the desktop/laptop market, and set to double over the next three years according to Gartner, it's a problem that you, too, may be fortunate to have.