I remember when I had my first computer all to myself in college, and for about the first two or three years I'd get skins for different music players and whatnot, and spent a lot of time finding every which way I could customize/personalize every program. And now, it's more of a meh. Personally I feel like I "matured" out of the desire to completely overhaul the look of every program. I'm not saying that all personalization is bad, but there can be tasteful lines drawn. Plus, now that I code I'm aware of the potential overhead of a fully customizable system; and a lot of the times it just doesn't feel worth it.