F power chord
I love how this depicts an easily done power chord on the F fret (if tuned to E standard). I also like how this shows a noir feel to it, and it's showing the hand in one steady position. I hate it when guitar drawings show the tuning knobs to be all flat, because that never happens, so I'm glad you showed them offset, which shows that the guitar is more realistic. The shading is perfect in this picture.
I would've made the arm have more of a comfortable angle, because right now the arm looks like it's either in agony, because of the angle, or it looks a bit off from the rest of the picture.
all in all, it's a great picture.