Good reaction with your self portrait... I like it.

Wonderful work in getting that expression!

I think there should be are darker shade below the cheek and beside the neck, so it looks like its in shadow. Also, maybe add a little shading to the hair, unless you wanted it to look like that. And lastly, I think you might wanna have a darker hue rather then hatching on the neck, so it looks more consistent. Other then that, you did a neat drawing of yourself. Keep up the good work!