I'm a beginner, so my words may not mean too much, but I'll try to help someone in need.
If you look at my sketches, what I like to do is that I find the line of action, the head, torso, and hips... But I do something different for the rest of the body. Using lines to represent parts of the body like legs and arms are totally fine, as they are just muscle on a bone, but since I watched [url=]this video[/url], I have a general idea of the shapes of the body parts. So, what I like to do is that instead of just making lines for limbs and circles for joints, I use ovals and circles respectively.
Oops rambled about my own art a bit, haha, sorry I'm not really sure what I'm doing. But maybe my technique will help? Not sure. Your stuff is good though. Keep it up.