100 Heads Challenge (set 1)

Just a month ago, I finished Ahmed Aldoori's 500 hands challenge. It was an awesome activity to get you to draw 500 hands in 1 week! I definitely enjoyed and learned a lot from the challenge, which is why I took on his next activity: 100 heads!
this time it's 100 heads in 10 days. He provided a reference pinterest board this time 'round. I started with a few heads the first day, 4 heads actually. i ended up doing more than just sketches, they were becoming detailed as i went from one head to the next, i was rendering, i was doing values studies. So i ended up not following the 10 day rule. The references were too nice to just sketch, i wanted to paint them. so it became 1 head a day for me. I'm posting the ones i really liked from the first twenty here. let me know what you think :)
you may view the rest at my instagram page (https://www.instagram.com/tuntundizon.art),
i'm still doing the challenge :)
and here's the orignal post by Ahmed; https://www.instagram.com/p/BsahaJEhW-r/