Well I said I would

And true to my word, I will.

it seems like you used a a brush with the opactiy turned to about 75%. This gets mostly noticeable the arms where you seemed to go over the same place twice.
For the head it seems like one pass.

Perhaps some underlying sketching on another layer before laying down solid lines would be a best course of action for this

I feel hat there should also be more to the picture, perhaps some more character with actual clothing and a setting, just to tell us more about Mr Bobby Lee here.

I have seen much much worse here on NG and other places on the net.

With Bobby's expression I think you should have went ahead with Angry Fac, even if only to relate to the Angry Fac inside joke, but thats a personal opinion, not a professional one