These sketches were done from reference photos in the Virtual Pose books. They were drawn using my right hand and left hand alternately. I'm quite ambidextrous, though my right hand does have some dominance. When it comes to sketching, I've found that when using my left hand my brain's autopilot, which tries to tell me what things look like rather than letting me draw from observation, kicks in less strongly.
Starting clockwise from the top left, the sketches were done using my left hand, right hand, right hand, left hand, right hand, left hand.
Starting clockwise from the top left, the sketches were done using my left hand, right hand, right hand, left hand, right hand, left hand.