Hey Matt, 
This is my first submission. I got one of my drawings in my Sketchbook and remembered what I struggled with this sketch.

I tried to capture this anguish of meeting death from the music video (fool’s gold). 

One of my challenges is Proportions. Sometimes I feel my drawings are always out of proportion.
The second challenge here is Shading. I tried to use a common blue pencil from Faber-Castell (Graphicolor), so I could not erase much in this sketch (more permanent work).