This is awesome! I love it. Two of my favorite things combined, that's for sure!
The only thing that bothers me is his neck... It just looks a bit constricted near the base. Otherwise he looks great! Your style is very smooth and clean.
I see what you mean. His arms look fine though, I think. It's just with the size of his head that little neck looks like it might snap. But maybe I'm over-thinking it. XD