This piece is hit and miss for me.



Any "flex" pose can look awkward. By nature they're kind of unnatural poses meant for emphasis. It either looks right or forced.



The hands on the waist is a tricky shot to nail, as much of the hand disappears around the sides while the thumb wraps around. Combined with the emphasis of muscle on the arms and shoulders, this makes the hands sit funny and look smaller than they are.



A full-bodied image, or a composition that showed more of the legs might have balanced out SOME proportions--without thighs or a standing pose for reference, the character's hind end looks more emphasized than it ought to be, for example.



So yeah...valid critique. Thanks!