The zipper looks too angly like >. Unless that's the way the jacket was made, it should definately not look like that at all...It should follow the contours of his chest to some extent, with maybe a few wrinkles here and there. I like the head, but am undecided about how I like the cubey shading...or is that just a result of this being a WIP? I do, however, like the way the pants look like urban camo, only...uh, brown. Also, the back/side of his jacket looks too pinched in at the middle, and his legs are at a different perspective from his torso. They should be rotated toward the viewer a bit more, or widen them a bit. The sleeve is oddly shaped and inconsistently girth'd.
Other than those things, this is really cool. I like the orange/red jacket colors. He looks like he should be in the military.
Oh, one more thing: I get the feeling his hands should be oversized to match his feet.