Superman Fan-Made Graphics
I enjoy making graphics related to the Man of Steel. Here are some of my creations.
Note that I generally make wallpapers the size of whatever device I'm using, and I usually use laptops.
Lois & Clark: Clark Kent and Superman - 1366 x 768
Golden Age Superman: Embroidered - 1366 x 768
Superman The Animated Series: Clark Kent - 1368 x 768
So far, I've created 27 Superman-related themes for Mozilla Firefox. You can see them here.