Alrighty from listening to Bobbi's feedback I enlarged my initial Dr. Jekyll sketch and really focused on refining his expression.
I also added some mood lighting to give me a feel for how I want to paint the piece. I looked at a LOT of antique daugeuerrotypes and I think I've got the lighting approximated pretty well.
I really worked hard on his expression so let me know what you think. I want his expression to constantly change for the viewer so they aren't quite sure what they are seeing.
One technique for achieving this is to literally give a each side of the face a slightly different expression - not drastic but subtle enough so that the viewers eyes bounce back and forth across the face and can never quite decide what they are seeing.
Hopefully I got it right.
Here is an example of his different expressions.
But again all this should hopefully be subtle yet still convey a man whose intense conflicting emotions are boiling beneath a carefully restrained and composed Victorian veneer.
As always I am interested in your thoughts.