Okay got a bunch here. I started off with a couple Mike Butkus studies but found most of his stuff was heavily rendered, though I do love his illustrations. I found a couple images from an old instruction booklet he wrote. Then I did some David Finch studies. He's my favorite comic book artist. I only did some portions of his work though, as I frequently do studies of him to begin with. Finally I did a couple Jeff Watts studies cause I love his line work as well... and I just couldn't think of anyone else to do. Of course I attempted the skull but also did a figure of his I found in a Google search. I attempted one in graphite in my sketchbook during my work lunch break. I found it very difficult and decided to try it again, at home, with charcoal.
Okay slay me. My pup kept moving... I did my best. I attempted to draw some random cereal boxes and soda cans my son left out on our table but I was just not enjoying it. The barrel sharpener, however, had some fun ridges to play with. I probably should've used a straight edge.
Here's mine. I call him, "The PAINgolin." Hard to tell but there is a lighter, looser, drawing underneath the cleaned up lines - I got carried away and didn't follow directions. I was focusing on my tapered and CSI lines.