Alright, well, these seem to be just test pics for posing so we’ll disregard camera work.
Next is editing. None here except DoF. For that, spend a TAD more time trying to focus on the actual person. At the moment, everything is blurry. We as the viewers KNOW what we’re supposed to look at, but it still looks like the subject is blending into everything else because of it.
The posing… Well, Bad Username covered that part.
Actually, another tip. For a pic like this, try zooming in a bit more on the person. It’ll look better and draw MORE attention to him. With so much of the picture not focused on him, it makes you want to look around. Unless you want to have people look for something else other than him, try to cut out the unnecessary things and zoom in. Also try to go for a less generic camera view. Perhaps from the front, slightly below and slightly to one side.