Very nice on both of them. On the second one, however, I have two questions/suggestions. First, are his hands supposed to be missing? Or is it supposed to be like that? Secondly, I would suggest trying to feather or blur the edges a bit more so the green and red won't show as much. :]
Here's a wallpaper I made a little while ago. Pretty simple to make once you get the hang of it.
http://i57.photobucket.com/albums/g218/Strawberry-neko/air_wall.jpg