One of my favorite characters from the show Lost was Ben, simply because he was a perfect villain, and then a perfectly misunderstood guy.
I used average clay to make him, then with plaster I created a mold. With shalac and some vasalene, I poured more plaster into the mold and let it harden before taking a chisel to it and cracking him out.
I chose to put up two pictures with different lightings due to the fact that his expression seems to almost change depending on how the light hits him and the shadows show.
((excuse any misspelled words in my comments))