I'm going to be honest sir. dont really like this that much. He look to knew, I was hoping for the aster chief effect. more detail, maybe more scratches or marks so he looks like he was accually doing somthing, wih out the marks or scratches or detail, it just looks like a halloween costume.
The lighting of what he wears is also kinda messed up.He is not very bright nor dark. It is pale. I suggest making it a little more shiny. I know I know, I have no problem with the dark backround, It is accually one of the few things that I like, but wht bugs the hell out of me, is that his head looks realistic, but everything below looks plasic and bland, accually, pretty fake. I am going to be honest, tis is not the worst thing I have seen, but not the best, hopefully you could take some of these tips I gave you. I do think this is nice 3D art. I do 2D so... but lets get back on track. let me summerize now.
Better color (Brighter Darker, not so pale)
better contrast is needed( shiny)
make your mind up.( make the whole thing 3D or 2D)
and that is about all I have to say.