the good thing about pencils is that you can erase, the bad thing is that it can take a long time to fill in any large areas, like of shadow, which I can paint fairly quickly. But, I can NOT erase, at all. So it means committment! (because I paint in ink)
I know, pencil takes a long time to build up the depth. When I do 16x20's I get SOO impatient.
Your work is lovely though :) a very nice balance of gestures and realism, LOVE IT!