Great model, Jeff! Wonderful textures, too.
As mentioned, the pose is the weakest part of the image. Try to think in terms of a silohuette when posing a comic character or any character for that matter. You want the pose to read quickly even if you can't see any detail. Mainly, I'm referring to the leg on our right. And a twist to the upper torso would add some excitement also. Everything else is very professional looking!
Jim