Hmm... You've learned a lot about proportion in the time I haven't been watching. Now all that's needed is a little anatomy lesson and some hard core drawing instruction... good luck finding that here State-side. I've found one of the few people left in teaching that was academy trained and it's helped me out considerably.

Now for the critique! XD

I love the texture in the background, if only there were an easy way of getting texture onto the figure right? Well, with a computer, it isn't easy but it is doable. All in all, this is good piece, I don't much care for the composition but that's just training talking though. The arms look a little odd... nothing proportionally at least. Just their placement is all.

Other than that, I think this could be a very strong piece. Well done.