overall I think you have captured the gesture of the figures very well, however, I think your sketches could use a more consistent line, what I mean by this is, using fewer more confident lines instead of many small individual lines making up the sketch. Proko's video on how to hold a pencil and the different types of grip such as overhand and tripod grip really helped me with this. I don't think this applies to all your sketches though just a couple. Keep up the good work.