Good lighting skills and some interesting framing ideas and post production.
This brings a lot of good things together, a surreal visual narrative and a lot of detail. Perhaps the styling is a bit dated and busy and his hand could have fitted into the frame. Your logo is a pain too as it obscures the fact that the chair is on bricks.
<img src='http://photos.modelmayhem.com/photos/130101/14/50e369730461a.jpg' />
Again with the logo. Nobody will steal the photo. But a lot of people would probably like to see it if they are to work with you. If I thought I'd get photos back like this from you as a model, with my face obscured, why would I give you my time?
<img src='http://photos.modelmayhem.com/photos/121229/21/50dfcc8b27686.jpg' />
I like this even though there's nothing going in it. But the expressions are reasonably intense.
Here I'm starting to get bored and a bit nauseated by the texture effect you've vignetted all around the image. I think the composition is what's lacking, not the absence of texture.
Not enough going on here to justify the closeup in my opinion.
This has a beautiful combination of background and foreground lighting. Just shoot everyone in that spot and you'll be fine.
Nice light in this one too. You could do so much more - find architecture or nature as a setting.