Being the sysadmin that I am, I have many machines performing many tasks. I am always on the lookout for a nice screen saver. I have one such setup with the Google screensaver that grabs screenshots off Flickr.
On yet another machine I have been known to just log in to Wow, find my favorite spot, zoom all the way in, hit alt-z, and sit there. Of course I have to hit the space bar every once and a while to keep me from AFK'ing out, but it provides a nice screensaver and allows me that little Wow-shot-in-the-arm to keep me from twitching from withdrawal.