These are fantastic! I think you're pretty brave to be doing some of them in charcoal; I tried using charcoal one time in Drawing, and it was a disaster. I like graphite better, but what I really, really love is colored pencils.

I think that your work shows a lot of emotion. My favorite picture of yours is the one with the man with his leg up by his head. I love how you used the black to outline his muscles and shadows, and how you used the red in the background. Its really, really, really cool!

The shading in your hands is excellent too; I particularly like the second one best.