I'm so in love with your latest rendering, Mark901857, but I've got one little suggestion: In two parts: First of all, what are you working on this morning, and second, why don't you be more than spontaneous and gutsy in your edges and spaces in your next 2 min sketch, pretty, pretty, pretty, pretty please, please, please, please???? The reason why is because, your proportions will feel least stiffest, and most dynamic, energetic, and fluid, hope and have trust that it'll be completely and totally beneficial.
I love the flow that has been captured in this piece. One thing I will suggest though, is to take a pen and just go for it. Scribble in the whole shape of the body and then refine it to make it more detailed. Letting out your inner child when you first start on a new drawing keeps the drawing fun but it also allows you to create a more fluid piece. However this is just a suggestion and overall I really like your piece!