YES you definitely made a lot of progress ! How did you you train?

I think these look great! I would love to see more of those small shapes you used on 119 and 120 to give the drawing more life. Also, since the image is small I couldn't see the hatching very well, but I would incentivize you to trying using more of it. Check out REMBERT MONTALD for reference. Hopefully it's helpful, cheers!

Hey Guillermo, great job on these. What I'd say is they're definitely correct, nothing much I'd say about proportion or structure. What I would say is that they're lacking confidence, or personality. They feel a bit timid, like you're doing studies of heads and not art. You're definitely understanding the information objectively, but it doesn't feel like you're injecting much of your own personality into the studies. An exercise I'd recommend trying is to do contour drawings in pen without the intention of doing a "pretty drawing". The point of this is to see how much of the information is integrated into your subconscious drawing process, and too let your brain try out a bunch of different shapes without the fear of failure. If you do do the exercise, let me now! I'd love to see what you come up with. Hope this helps!

omg loving it ! ✌😄

Some caricature exercises.

Check your perspective on some of these! I did a quick paintover of the Samuel L Jackson one to illustrate. For poses with a more difficult angle, check the 3 major axes. It can be helpful to construct a small box to make sure you understand the angles. See this post for more detail: https://www.proko.com/community/topics/i-need-critique-on-perspective-and-structure-of-drawing-the-heads#kU