Well, fullmetalrunt, let me say, Love your straight line figures. I totally love how you were able to communicate movement and solidity in those straight line poses.
In addition,I have one very smaller request: Why don't you strengthen your straight-line movement and solidity in 1 30 second sketch, pretty pleeease? The reason why you would do this is because, you'll be able to elucidate your attitude with 2 straights. Look for that it'll help and support you out. Polyvios Animations
I think you pretty much nailed the exercize. All but two figiures have great proportions. To further the exercize, you might want to apply more of the hatching lines to establish the volumes on some of the figures you've drawn. Also, Compared to the long poses, your short poses have more movement and look more proportionate. You might wanna approach of your long poses the same way that you approach your short poses. First establishing the whole figure with a quick 30 second or 1 min gesture, using that lovely movement you create, and then going back to render the form more to show your volumes.