The last time I submitted a wallpaper I got some feedback. I decided to change the way I make wallpapers. Now they end up with a pretty dull background. I'm aware I still need some practise, so please tell me more then "wrong" or "bad". So I would like some advice on what I should improve (examples how, please) for the background.
http://shikakuentei.deviantart.com/art/Bunny-Girl-186322770
http://shikakuentei.deviantart.com/art/Papa-was-here-186314844