Drawings
You got a real good stroke going king4life! It seems to be "free" and flow natural at some points, and then hesitate and lose some flex at others. I think it might has to do with the speed. When you're hand runs the show, it floats and nails it. But at certain points the old brain takes over and starts fk it up. This is normal for all artist/drawers, sportsmen and dancers etc, your body memory and intuition are better than your conscious brain and forced muscle control.
Routine to "free your hand"/cultivate your lines [Croquis without model]:
1: Take any magazine ore newspaper, a drawing tool and a stumble of white sheets.
2: Set a clock to beep every 10-30second (i like 15)
3: Sit down and draw as hell, using the magazine start drawing off the top left motive on side one. Next motive when the clock beeps, and so on. Just turn the sides when you need to and take a new sheet when the first are full of your small drawings.
4: Continue this for minimum 5mins.
This exercise are like punching a bag to a boxer. The more you do it the better. Feels strange in the start, but does magic over time !
[BTW, wtf TBashDude !?? Flattering that you make me an TB-someone like that, lol]