I'm posting 3 thumbnails (of wallpapers) from excellent series.
Ghost In The Shell
Claymore
(Anime is good, manga is BETTER)
Edit 1 : Image links fixed
Edit 2 : The Wallpapers (and many other fantastic anime wallpapers) can be found at http://www.mercurialdesign.net/
My current Wallpaper though : http://gallery.minitokyo.net/view/270966/
Nobody is crazy enough to accuse me of being sane.