Another piece I feel like sharing. As far as composition and use of negative space goes, I feel like this is my strongest piece. Done entirely in graphite, with liberal use of the 8B pencil (mmm-mmm) I snapped a pic of this with my HTC phone and fiddled with it in photoshop to get the contrasts right. Mostly.
The shading on the left-most girl's shoulder doesn't have as smooth as a transition as it needs to. I was probably rushing it with my tortillion on that part. The bottom-girl's lips is the one thing that I think is holding back this picture the most. In a drawing where the lips are the only part of the face you really see, it's very important to get that right (That and getting a girl's lips wrong is a downright fucking sin in my eyes.), so I was pretty dissappointed when I couldn't nail that part down.
But here it is. Enjoy my friends.