>>7716669
Lixin Yin did a challenge of 100 hard round brush portraits. Some are really great and you can see every stroke. There is a bit of blending/smudging with other brushes in some of them though.
https://sanmingsanri.artstation.com/projects/g2PQr8

>>7717713
I've heard a lot of very good digital painters recommend that. But don't take it too strictly.