First...these are great....really great. Second, I think the first few could use just a tad bit of contrast...not much, but a little. The first few seem to have a little haze to them possibly from UV or just the environment and a tad bit of contrast will kill the haze look. Other than that I think they look great...exposure and composition are spot on. I can tell this isn't your first time behind a camera.
Edit: Were these shot on digital or film? The more I look the more I think it looks like film which could be part of the non-contrast look...if so, I like it and would leave it....I think a couple of those would look stunning in B&W too.