Nice stuff! Clothes are very good and the muscles, too. Only thing I see which doesn't look like it's working are the obliques in the frontview and the gesture in the sideview one. I think the sillouette woud curve in faster and make the T-shape more dominant and the spine is a curve which you can especially see in the sideview and the latissimus usually don't make the seeable S-curve disappear that much. On the biceps, I watched you're pictures multiple times, but I did not catch any picture with a drawn/painted biceps, is there one?
Good work overall, keep it up!