Very nice! Looks like my minions got an equally muscled brother :D
As a critique id say you could improve on the shadows, maybe take a reference (makes it so much easier) you put most of the shadows on the edges of armes or legs but this is rarely the case. The shadow is mostly the darkest close to the edges but not on the edges (there is light reflected from the bottom on the edges usually) hope I could help with that, it took me a while to figure that out...