What I noticed:
1. good anatomy & 3D skill to draw without being too dependent on refs
2. quick decisions, minimal experiments with poses, brushes, concept...
3. Optimised workflow: know your process tool (app & shortcuts)
4. Priority: not everything needs the same attention
Okay, genuine question: how do you draw faster (looking at the 100 days art challenge)? What do they optimise?
I take so long for every step in my process.