Seeking Critique on Gestures #2

Hi everyone, I'm back again! I'm once again asking for critiques on my gestures. Taking Aunt Herbert's advice on how to construct and ultimately draw gestures. I believe I have improved, however, the three things that I am definitely struggling with are: proportions, how to draw the gestures more quickly (completed within 2 minutes), and how to imagine the 3d shapes in the gesture. I've been going at this every day for 30 minutes now. I would love some more criticism so I may improve. I have also been trying to clean up my lines and make my line confidence/ quality better. 

I've done 15 poses within the timespan of 2 minutes for each pose.

https://imgur.com/a/QPPhUEI