Does seem very bland, however all new comers (like myn) were very plain and didnt have a good flow! The best way to learn is to reading peoples tuts learning different techniques and adapting them!
Yeah, Ill probably add more color to it, especially on the right side to help go with the light that is on his arm and shoulder.
agreed about the color. some contrast, a gradient, something to break the monotony! however, I like that you're experimenting and you've definitely got some good ideas, so run with it and post any changes you make. 6/10 at the moment ^_^