In addition to what Mighty and Gors have already said, his legs are a little bit off; his right (our left) leg is shorter than the other, and his left (our right) boot is larger than the other somewhat. The shading on his left boot is also a little wonky, as it contradicts the lightsource. Also, the darker blot on the lower part of his right boot is a bit distracting.
EDIT: Actually, it seems to me his legs and torso are not aligned. This may or may not be causing his right leg to be shorter. However, the points about the boots still stand.
EDIT: Actually, it seems to me his legs and torso are not aligned. This may or may not be causing his right leg to be shorter. However, the points about the boots still stand.