Back in 2020 I was fully committed to Clipstudio and was determined to try out just a TON of brushes to see what might stick. I started out using a quick doodle per year since then to test styles on. 2020 was a quick Jigen face.

Brushes used
Noisy Marker
Grunge Dot
Real Pencil (CSP Default)
Marker
Concept 3
Muddy-Ari
CRM Flat Bleed
Pencil Hatching
Crunch Hatching
Nature Hatching

Let me know if this was helpful! I really like sharing brushes & things like this.