Here are two more portraits.
In the first drawing, I tried to have much more contrast than my previous drawings. The previous drawings were like one gray image. On this drawing, I noticed that I need to put a lot more work into shading. I didn't shade the forehead very evenly.
On the second portrait, I was trying to get a feel of hair that is not straight. I am comfortable with straight hair, but hair that is not straight I have all sorts of trouble with.
I tried to use a different approach to the curly hair and as you can see, I was mostly unsuccessful. The portrait looks like two different drawings because I used two different techniques for the hair and the rest of the drawing. After hours of struggling with the hair, I finally gave up when I couldn't get the hair to look right.
I can really use some tips on drawing curly hair.