I think is a good drawing. However, I think the neck is too thin. I think it would be better if it was a little bit wider. I like the shading a lot. I think you did a good job on that. I think it would look better if you add some intense shadows here and there. That's if you like it in pencil. In color it would look good too. I think it looks good though. I like the eyes a lot too. Good job.
Excellent work, I wish my drawing skills were as sublime. Not that my drawing skills are bad, just not quite as good. I love the black and white style of art, but I think there were signature details that were left out which could have added to it greatly.