I love the look of the... vest/armor on this guy. It looks like there's a layer of plastic over it, giving a very shiny appearance. The shading looks really cool on this, although I'm not really liking the anatomy of the creature. The left arm is a bit longer the right, and the torso is just so short!
He looks funny, but very detailed. I would suggest making the legs a bit longer, and try to get rid of the thick black lines. The clothes are amazing though.