Let's see all those fancy Windows / Mac desktops! Show off that awesome wallpaper or custom icons! I'm on my work laptop at the moment so nothing to see here but I will post mine when I get home today.
Might be a little hard for me, as my systems are set to rotate wallpapers every half-hour or so. The rotation includes NASA photos of the universe, some high-res space art, a little random game art, and some of my best STO screenshots. My screensaver is Electric Sheep, which I've been using for like five years or so.