Hi Stu,
I hope I'm not too late with offering my thoughts! I've checked out your gestures and they look very dynamic with motion and range, so I think you did well there. :)
The only thing that stands out to me is that your gestures are very heavily stylized and take little note of anatomical proportions. Your next step could be to focus on proportions to help you further, if your goal is more realism. I particularly notice that some torsos are very short, for example. I notice that you focus primarily on the silhouette of a gesture; have you tried starting with fluid guidelines to draw the body parts around?
I can't recall if I've linked you in the past, but just in case, here are some excellent articles with useful information on managing this:
https://line-of-action.com/gesture-basics-1-line-of-action/
https://line-of-action.com/gesture-basics-2-torso-and-hips/
https://line-of-action.com/gesture-basics-3-joints/
I hope this helps!
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