The wallpapers can feature characters from your favorite anime series such as Naruto, Samurai Chaploo, Karas, Bleach, Hell Sing and many more. They can also feature your favorite anime movie characters such as the ones in Full Metal Alchemist, Ninja Scroll, Matrix and even characters from the US animation cartoon movies. Manga comic's characters are also featured in wallpapers that you can place on your desktop.
Try getting this animation wallpapers from various websites and you will find that most are in three dimensional or two dimensional. The good thing is that when you get tired of looking at one character you can always go back online and look for another anime wallpaper.