I quite like it, especially the shading(some people are hopeless at shading), but here are dome things that bug me slightly;
-Where is the other half of his right foot? Is it behind the rock? If it is, then it doesn't seem like he would be able to balance. Maybe its just me though

-The lower half of the bow looks like it needs to be shaded a bit. It could just be the angle though.
-His dagger (battle knife sorta thing) seems like it needs shading, and it almost looks like it was an afterthought, if you know what I mean.
If I sound a bit mean, I'm sorry, but it's my bit of constructive criticism, and what you do with it, I don't care.