Wow! Your portraits are improving so fast! You make the wrinkles and teeth on a face seem so natural. I can never do that...
On your last portrait, it looks funny because one eye is higher than the other. do you do preliminary lines before drawing in the facial featuers? If not you should start. It really helps a lot with proportions.
Your acrylics are spectacular. I'm starting on acrylics soon too so it's really exciting to see yours. Go for a more ambitious piece next time!
"Of all the things I've lost, I miss my mind the most." --Mark Twain