I like it, its nice and simple, though Muzz makes some good points. Find a bit of purpose to the pelvis (beside thrusting ofcourse), and maybe bend the shins a bit? They look a bit stiff.
Pretty cool bot :). The modeling is nice, but I'm going to have to attack the design a bit. You are designing using way too many primitive shapes, throw in some cooler shapes and mix it up. A good source of inspiration for that would be to have a browse through robogabos sketchbook on ca.org. Take note of joints, as yours…