The drawings looked just fine. The 5" ones looked very good. The shorter ones look as you might expect, rushed. On the shorter ones, you need to get the movement of the figure. I would recommend on all your drawings you start out with a simple stick figure to get the immediate action. lf you have time, you can add to the figure. Simplify (more if it is a short pose), e.g., an oval for the head, triangles for hands & feet., etc. Remember on a short pose you can not sit around with your elbow in your ear. You got to get with it. Study anatomy (do drawings so you will learn). If posible find a local life drawing class. Be sure to date your works so you can go back & compare them.
Practice makes better!; therefore, practice, practice and after a while you will, if you keep it up, good things will happen.