Helm, I especially like the new one with the girl and guy. Very nice stuff - Though I think the way you render feet could be improved a bit across all your images.


the image on the left points out problem areas and things of the sort, while the image on the right shows an example of how the critique can be applied...
I'll go through one by one.
The thigh of (his) left leg currently doesn't support the flow of the figure. It appears to by almost sagging despite his beefed/firm muscles. The red arrow shows your current action-line, and the blue line shows a possible fix.
Also on that same thigh, the frontmost muscle on the quads is just a tiny sliver in comparison to that of his right. I think his right thigh is better rendered in this regard.
His right arm also has a number of problems. with the palm of the hand facing away from the camera, all the muscles should twist around to support it. the forearm seems to do this pretty well, but the upper are doesn't at all. the bicept should wedge between the upper (extensors) and underside muscles of the forearms, but currently there is no such flow in it's connection (Ryumaru mentioned this as well) Also, his deltoid is no where near it's relative size it should be in comparison to his left.
on his left arm I outlined the extensor muscle. These muscles do not wrap underneath the wrists. They stay on top. You actually did this quite nicely on his right arm, but not his left.
lastly, I believe you've over-exaggerated his lat. Even on the most extreme buff men, the contour of the lat should meet up somewhere where the shoulder joint is. They way you have it drawn now suggests it connects somewhere to the underside of the tricept.
[edited a couple things]