It could just be that it needs a little line extending his jaw into the top of his neck a little bit (so it's not just a rounded edge).
If you go to this link:
http://www.cameronoaks.com/?page_id=285 and look at the logo, you can see a small line where the jaw goes into the neck to help break up the space, and I think that might help a lot.
Let me know your thoughts.