[andrewjshults]

Which ever background you pick, I find f.lux ( http://www.stereopsis.com/flux/ ) to be invaluable when using computers for extended periods of time (especially in the winter when the sun sets early). The quick rundown is that based on your location is adjusts the brightness and color temperature of your screen to match the lighting around you as it transitions from daylight to inside lighting. It's a slow transition so you don't really notice it until you look at someone else's screen and notice that it's looks really blue. The biggest downside I've seen is that it can't control the brightness of all displays (my MBPs screen gets dimmed but the Dell 2405 stays at the same level). It still does adjust the color temperature on external screens (at least on mac laptops it seems) which is better than nothing.