Your figure drawings look so clean and you seem to capture the gesture and overall proportions well. This is just my opinion but I think you can improve by drawing some of the anatomy and studying anatomy. The pointy part of the delta can be used to indicate the perspective of the arm and the ab muscles/fat can be used to indicate the perspective of the torso. The quads for the legs. It's just a way of indicating the structure differently and more realtistically but you have a very clean, simplified way of drawing the gestures that is very appealing to look at and is fine the way it is in my opinion.
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