The extreme shading is cool, and I mean obviously this is amazing work and I have no idea how you did any of that like wow, really, but, just some constructive criticism for beautiful technical work, the sharp contrast in shades makes the hands seem fake, or plastic-like. And then the crease on the third hand in the first row is so severe it actually looks like I could, like, slide a credit card through it.
I really need to get better at hands. >.< That and heads/faces on angles and in different poses. I can sometimes make them work but I can't draw a head looking upwards, You wouldn't happen to share tips would you? ;o