Since the subject of the thread calls it "wallpaper," why not assume it's wallpaper? 
Personally, I like to find wallpaper that has the subject balanced to one side, so that the area on the other side can be used for all my desktop icons, without covering up the subject of the art.

Personally, I like to find wallpaper that has the subject balanced to one side, so that the area on the other side can be used for all my desktop icons, without covering up the subject of the art.