Nice sketchbooks. Looked at your first page and straight away i thought the eyes are the weakest points of your pics. Checking out the last few pages you have sloved that problem. Great sketchbook keep them coming.Love the orc pic.
Great job on all those faces man!! The orc is looking cool as well, but don't get lost in the texture of the armor too soon! Think about and make sure all those forms are reading correctly based on your lighting, at the moment he's looking a little flat. Maybe get a cast shadow across his torso from his left arm, based on your lighting. Keep those studies coming man!
sweet progress, the head portraits are good do some more lip studies your lips look off somewhat, the 3 girls with no ref kick ass, I am impressed.
do some metal studies, metal tends to have harder specular light and sharper corners usually.
keep it up mate your getting there for sure