Hey Mathew, this drawing is really nice. I get what your saying about perspective, its a real challenge. One of the problems with focusing so much on anatomy, is that we tend to "normalize" the pose so that our anatomy looks "right". That's why I always work out the perspective first, then add my anatomy on top. That's why knowing how movement affects the anatomy is so important. Having shapes overlap shapes is the best way. You clearly draw very well, so I hope my suggestions are helpful, keep drawing :)