how did you start this, is it one primitive?? how long so far? (on and off), it has great proportion. did you use an image plain or all by eye. all the input from the other guys has helped i think, making you look and question, even if you were correct to start with it is good to look at it from a different gaze.

incredible.., reminds me of life drawing with real models, but with a slant, you block the whole model/person.