I like your choice of character and your filterwork on the background seems fine too. I have a couple a suggestions...I don't know if they would improve the image or not. They are just thoughts that popped in my mind as I studied your work.
1.) I feel the background color should be shifted some to match more closely the reflected peach-like color on his sleeve edge. Or maybe shift the character color palette more reddish to match the background more.
2.)Really not sure about this thought but I'll say it anyway: Have you seen the glowing dropshadow effect that many character have where they are surrounded by a glowing soft field of white? Try one of these behind you guy to see if it looks good or not.
Just some ideas for you to mull over. See ya.