I think its a good picture that could be made better with some posing adjustments. The exposure and colors look good and the background is interesting in that it frames the characters head.
1. Usually people look better when their hips, head and shoulders are at an angle to the camera. The right foot is back so you could have the person turn their right hip back, right shoulder towards the back.
2. If there are two body parts, try and make them at different levels. The eye and shoulders are at the same plane, drop one shoulder and tilt the head so the eyes are on two planes.
3. I'd feature the weapon a little more.
I'd compare this picture to: MetroCon: Send me An Angel
. It's much more dynamic.
"Destiny is not a matter of chance; it is a matter of choice. It is not a thing to be waited for; it is a thing to be achieved."- William Jennings Bryan (1860 - 1925)