I think my favorite thing about this is the way you did his hair. There is a nice range of value which seems to be missing in the face. If you squint it is easier to notice. I think some adjustments to your range of value would give the face more volume and make the drawing much stronger. Good job.
Thank you for your support @artmess.....I ll look into the details and youre right squint makes it easier to notice. I ll make improvements in my next sketch.