I love Blender
This is a nice model, but the composition (pose, background, lighting, camera angle) need work to really show it off. Right now, I can't really comment on materials or geometry because, well, I can't see it.
Also, some technical details: increase the anti-aliasing (OSA in the Render panel) to 11 or 16. Increase the resolution to at least 800x600, preferably 1024x768 or even 1200x800. Also, I don't how/why you did it, but the JPEG quality is seriously low. There are JPEG artifacts everywhere (see: above each foot, between arm & body on right).
Having said that .... THANK YOU FOR BEVELING!!!