Some pro level work...
Not sure why the votes are so low for this one, maybe a lot of people voting low to boost there own shot for the front page. I give it a 9 just because I usually prefer to see full illustrations, not just concepts, (Backgrounds are a good test of an illustrators skill)
First thing, the light angle that you have on him should be casting a few shadows that are currently a bit off, namely his hair, the solid bar shadow currently shown doesn't fit up with the actual bulk of what is casting it, giving me a sense that his hair is more of a wig then actually growing out of his head, still that's pretty minor and I bet most wouldn't even notice it.
Second, Highlights, you did an amazing job on the boots and face to create a good sense of what material they are made out of, but unfortunately the sword, and armor peices all seem to be made from the same material as the base clothing. Adding some stark pinprick highlights for a painted metal look, or bands of reflected highlights for an exposed look (which is done well in the left hip armor) can really make the fact that those parts offer some extra protection pop out a bit more.