At work, I don't get to do much to customize my computer. One of the few things I *can* do is change the wallpaper. Of course, I can't use anything that might cause a problem - no pics of babes, for example. So it's landscapes, astrophotographs, or simple patterns.
To help alleviate the monotony, I occasionally poke around the websites for home decor supplies, and see if they have any sample images for designer wallpaper that tile nicely.
Using wallpaper for my wallpaper.... hmmm....