Alright, a few issues going on here. Most notably the cropping of the image could be better, bring the bottom edge up more or continue the guy to the bottom don't just cut it off like that, it looks awkward. Second the red aura isn't really adding anything to the drawing, if you're going to give a character an aura like that it should factor more dynamically into the shading of the character the glow from the light should bounce off of his jacket. But I suppose it is necessary to separate the character from the background - bringing me to the next point - your background. This is a very grey picture, you should make your character stand out more from the background, probably play up the snow factor some more because right now the sky, the ground and the guy's jacket are all almost the same tone.
Last point - I'm pretty sure this is in some capacity traced or copied, it looks a lot like a live trace on illustrator because of the way the shadows and highlights are done on the jacket, I know for a fact that the face is from Disturbed's mascot, also the stylistic disconnect between the character and the background as well as it and your other pieces points to this not being completely original; I apologize if it is, but if it isn't you should really take this one and any other traced/filtered pieces down.
