Thanks a lot for your comments!

Actually he's supposed to be quite "stiff" and bitter :D
But I'll definetely give it  a try with the head!
I also see what you mean about the flow - I didn't notice that until now. I will try to fix that too!

i really like the shadows around the hands / wrist / lower arms, as they move closer and further away.

The head could use a very slight movment so its not moving exactly with the body apearing stiff.

and a last little note; the animation seems almost too fluid for a walk, more like a fast walk/run. maybe have a slight delay after each step to break up the walk a bit or just tweaking the timeing just to make it move a little less fluid. i know its wierd hearing; your animations too smooth! :P great work btw