Head reminds me a lot of macPerfect's new head. O:
Head and hands are the best parts in my opinion (I love your style of hands).
The major issue with it (which I've been seeing more in your work recently) is that it just seems too cluttered and lacking in a theme. It's rather difficult for me to focus on one part at a time. In the future, I'd recommend picking a specific underlying theme (e.g. armor, robot, clothing, whatever) and trying to tie all the different pieces together with that theme.