Hello and good morning, Afro, and welcome to our site. How are you today. Say, great range of expression and gesture and anatomy in all of your poses, but these lines all look or seem too hard and stilted to my view, but how would you like to try out our interactive drawing tutorial here? The reason is because of two things: 1) To help you loosen and liven up your drawing and sketching styles. And 2) To help you refresh yourself on your gesture sketching, not rules, but ideas. For most info on straights against curves, kindly look into a Kindle of Mike Mattessi's "Force Drawing Human Anatomy." It's got tons of the most useful and specifically practical info on gesture and essential anatomy, like the pelvis in putting curves to offset the straights.
So, my hat's off to you, your learning curves, and your marches of progress.