Wow, I think this shows a lot of improvement!!! I think the face and the legs look MUCH better, and I can see you really made a great effort to improve your piece, so you are to be congratulated.
There are still some problems, but I probably won’t be able to give this a thorough review until I get back from SIGGRAPH on August 5th, but in the meantime, I hope you continue to refine your drawing, and participate in some of the other threads going on, like the Figure Drawing Workshop (see Sticky at top of Page 1) etc.
Thanks for posting your update! With reference to Opposing Curves, I would just suggest going through the initial tutorial again, and looking at the work which people submitted.
These are not easy concepts, and can take weeks, months, or years to REALLY learn. So don’t fret if these things don’t make sense right away. The key is to KEEP DRAWING, there is nothing which I nor anyone else can TELL you to make you better ~ you just have to draw a lot in order for these concepts to begin to make sense. Trust me, it’s taken me YEARS to learn how to draw, and I still don’t feel like I’m “there”, nor will I probably ever feel that way.
Keep going, and keep posting your work!