http://akulakhan.animepaper.net/

Try sticking to 1 or 2 of those images and get rid of the wishy-washy affects around each image, they really subtract from the images. It's too busy and its impossible to make out a common element in the wallpaper, so keep it simple!! Also learning to vectorized especially characters (whole scenes would be very difficult) would knock it up a few notches. You've got a long way to go to get this wallpaper up to submitting quality, grasshopper.