I like the posture of the man on the left. He was groomed very well. His hair was thin, pure white and combed back, giving the appearance of a wispy skeleton of a coiffure.  I barely finished the bottom half of the man on the right when he was called in to give a blood sample.  I didn’t want to leave him headless, so I put a circle where his face should have been.

Two Men Waiting at the Lab, One with Unfinished Face
Pen and Ink Sketch
10″x8″ 111# Moleskin Journal