Lovely sketches, but a lot of unfinished stuff. Want to see more progress in individual pieces! :-) Love the expression in post 42, I say that if you've decided you dont't like your drawing - what could be better to dispose of it than to just say to yourself - I don't care about it, so I'm just going to go for it and experiment! Get your charcoal or soft pencils out and just lay in with the blacks - exaggerate the shadows. Then work more on the light bits. It's a trick I've learnt only recently - that often we care too much about single drawings to actually draw them. Which is obviously silly.
Keep up the good work!!