There are 2 wallpapers that caught my eye when I logged in and this is one of them. I must say I have no complain over your vectoring. It's very nice. However I do see a problem with the lighting. It's like everything is too bright and the characters are not blended well. If there is a strong light source coming from the back, I think there is a proper way to shade the shadows of your character. Well, if that is fixed, then I guess everything would be fine.
Keep it up!