I know that it's only a doodle, but I'll point this out anyways:

When a hinged part of the body -- an arm, a leg, even a torso -- blocks itself along the same plane, as the left forearm and upper arm do here, it not only seems visually ambiguous, but also constricted and stiff. It takes a bit of life out of the drawing.

Please don't hesitate to practice with big, dramatic gestures: as you learn to pose figures, as your understanding increases, you can always begin to tone things down for a more subtle, naturalistic approach.




Mark

I would like a little clarification, by left, you mean his left arm or the viewer's left?

His left.

See how the forearm "disappears" into the upper arm, how the edge of the hand "blends" into the deltoid? Visual ambiguity! And a pose that seems more constricted, less expressive than it could have been.

Ahha, I see now!