I recently bought a white one for me and a pink one for the wife. I don't know I just like white. I think it happened when I got my first PSP (the fat one). It was black of course. Then I saw that in Japan they had it in white. So I got one of those, again a fat one, and sold my black one.
Then when it was time to get a new cellphone because I lost my Moto V635, I bought a Moto Ming A1200. Of course, since everyone else had the black "fuzzy" model, very few people had the red model and no one I saw had the white, I opted for the white.
And yes, I also have white Sony MD-EX71SL's. Perfect because I can use the short chord when I'm at the gym and put the extension on when it's in the backpack or pocket.