This is still too conservative for my taste and non-exaggerated. This was done after a few other studies of the head and I still want to take it further. The problem for me is balancing and managing the design after exaggerating several of the head's elements. Also, realistic subjects have all kinds of subtle soft planes that dissolve into one another and aren't mathematical. You wouldn't want to draw all of that for animation, so it seems more attention to line and space, which implies form will be worth looking into.