Not a fan of the checkerboard plating on the bottom of the head, im of the oppinion that if you have to resort to checkerboard plating, then you've done something wrong in the design phase. "needs detail, lets add more metal plates!"
and the nose looks far too much like a nose.

love the mapping and colours of the head though

design of the body is ok, just looks a bit too much like "needs more metal plates in funny shapes"
and the use of blue screams amateur, more subtle use like you did with the head looks muuuuuch better.

the lighting and shadows look like you painted with glue instead of paint, could have been sharper and stuff, comes with practise i guess

overall, it looks ok, just lacks a focussed concept