Does it even really matter what you use for a wallpaper? Just go for whatever you like and/or are in the mood for. It's what I do every time I feel like changing my wallpaper; may it be for my computer, my PSP, or my PS3.
If I'm in more of an Sonic mood? I find a cool Sonic wallpaper. In more of a Metal Gear mood? Find a cool Metal Gear one. Just found something awesome/hilarious and I wanted something related to that to be my wallpaper for a week or more? I do it.
_________________ The Local Video Gaming Lunatic
Recent stuff I'm into:
Watching: A Certain Scientific Railgun (ep.14, stalled), Hoshi no Kirby (ep. 71, stalled), Nazo No Kanojo X (ep. 8), Acchi Kocchi (ep. 8)
Reading: nothing