Chuck,
I see by your bio that you want to take portraiture seriously. If that is so, you have to do all the serious study a field like this entails.
You obviously are an educated and intelligent man, not afraid of hard and dedicated work.
I would suggest you review the suggestions I made in the thread
"Critiques and Anger; a Lethal Mix".
Roberta Carter Clark has an excellent book called "How to Paint Living Portraits". I would suggest you do that from A to Z. Do not use color until you have mastered form. Then get Daniel Greene's drawing tape, next his painting tape.
I would prefer to see your next post be a study of a head from life, not just another rendering of a photo.
Sincerely,