User blog comment:Harold Burned-Mane/BMC - Sketches/@comment-1188343-20160721121812

Needed a tad more shading.

You might also try using pen to highlight some of the darker areas; like gel pens, not ball point. I use it sometimes when I need an area really darkened, but not the shiny-ness of too much pencil. Shading too much in a spot with a pencil also tends to warp the paper in that area, unfortunately, as you no doubt know.