i actually like the flat colour.
start messing with the brightness, the torso is a fair bit darker than the joints.
nifty mapping between the joints and the torso.
but be careful with that mapping though, dont just do it because "needs mapping", otherwise it starts falling into your "detail for details sake" argument/debate.
cant really visualize what the structure of the torso is actually doing, but then again, you havent added any of the depth elements to it yet, so its too early to say.