I am a beginner/intermediate drawing artist. These are looking amazing. Proportions look good for quick gesture drawings and strokes look relatively (to others) natural or unforced.
As far as being able to express movement and emotions they are excellent; if you are interested in more realistic proportions you can attempt to work on them by practice. I find drawing the same figure and pose over and over helps the eye-hand-brain align, so maybe draw the same study more times.
Summary:
* Excellent expression of form, movement and emotion
* If your goal is more realistic proportions, try drawing the same subject and pose multiple times (maybe even dozens).
Keep up the great work :)
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