Thanks so much, Alex!
Your palette sounds luscious! I used the colors I did because they are in Marvin Mattelson's palette and I'll be studying with him in a couple of weeks. The fact that I am a rank novice in mixing paint colors (due to my dry media background) makes it all the more likely that I stumble with these things. Ouch. I have learned volumes this past week! Mostly by accident.
I did muddle through some changes before I saw your post and will also look closely at the areas you suggest. Specifically, I worked on the overly flat tendon on the neck. I was beginning to worry that I would have to call this portrait, "The Neck". Thank you Alex, and also to Lisa Ober who has been coaching me through e-mail!
Here's my update: