Hello Pennyberyl!
I enjoy your drawings they have a lot of personality and power. I have some ideas that could help you improve: first, a tip that a teacher once told me that to create more interesting figures, you could play by opposing straight lines and curve ones, generating contrasts, so instead of making the leg with only curved lines "()" you could try contrasting them "|)".
The other thing that I could say is that maybe you can try to mark better the hands, feet, and head; I struggle a lot with those parts, but practicing is the key to making improvements, so that's my advice.
But in general, I can see that your poses are dynamic, something that is sometimes difficult to achieve, so congratulations!
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