These are amazing figure drawings. You are secure with proportions and anatomy. Your poses are looking dynamic and natural. You can only work on the graphic appeal now a little bit. Emphasizing the main drama of the pose. But that´s a matter of taste.
But I keep asking myself. What´s your goal with it?
I do figure drawing to understand the human body so I can use these rules for character design, animation and modelling. You have a lot of nice studies but I don´t know your artistical desire 😉
