You could add a bit more geometry to the figure and folds. I think the proportions work, but an average person maybe has a bit more length in the torso/ hip area and a smaller upper body. A lot of your lines are all stroking down. Alter these lines to create more form from different angles. Hope this helps. It's nice aesthetically : )

I think you're weight is on the wrong leg.

I second what xun says - the 2 minute sketches are brilliant. They are full of movement but also crisp and clean. On the contrary, many of the 30 second poses look rigid, overthought and scratchy. Not all of them, I do think that poses 9, 10 and 17 have a wonderful sense of fluidity to them. These are probably more successful because of the confident, long lines that you use for them. To address the rigidity, I would suggest that you keep practicing the 30 seconds but without worrying about how they look or if the proportions make sense, just look at the pose and try to summarize it in three to four confident and exaggerated lines. Stop after every 5 to 10 sketches and evaluate what you like and dislike and keep this in mind as you do the next 5-10 sketches. Then repost here again :) I hope that helps!

These look amazing! But from watching the gesture critiques video I would posit that they are perhaps a bit too contoured and perfect for gesture exercises. They feel very thought out and lack the looseness and exaggeration associated with pure gesture exercises. That said, to my eye they are full of movement and show a knowledge of anatomy I aspire to have. I really love the last one in particular - I can feel her falling! Well done.