it looks great

its no contest that ure good at shading, but my advice is that its not ure skill of actually drawing the featuers of the face but rather the placement of his features.and try more of a kind approach for the face and reduce the circular effect.

it looks good great job. the shading is awsome.

His right arm seems a bit short maybe...but other than that it looks great! And your shading looks awesome.^_^

I like it. In the mouth area you might want to pull it a little more to the left under the nose more but just a little. And the left hand looks a little small. Hey you asked for suggestions so I gave you some. Hope they help. Even a little.

kool i like it!

it's good, and mouth area looks just fine; a little misplaced, but overall, it's a good pic.

I think you did fine. However, a more original work would be better to gauge. It's hard to comment on and rate a pic that's just a copy of original art.