The guy on the bottom with the sunglasses is looking more roughly sproted than the others. There's very little shading on him, the lighting of what shading there is looks incorrect, and a few bits of his body are looking a little blob-like. Mostly his hands and feet.
The boss also looks like he could use more thorough shading. There's just not enough variation in it, and a few spots, such as his big bicep, appear oddly shaped because of it. The lighting is also inconsistent again.
The others look pretty good, though.