love the first one! Actually, they're all great
Now for the c and c (just little things

First one - if he was turned just a little bit more, his whole neck would be in shade instead of just part. And the sun's pretty bright, so its a wee bit distracing.
2. The shot is great, but his face is too much the same grey tone as the paint to the right of his head. I would like to see that one in colour.
3. The background needs to be composed a little better (to keep in mind for future shoots). The woman walking behind him is a little distracting, and I'd like to see some interplay between him and the statue.
4. I would photoshop those white buildings on the left out (make them into trees). They're a bit distracting.
5. I really like this one, but his face is a little dark.
A little fill-flash or other light source on these would be useful, I think.
Hope that helps some.