a lot of these look very in the moment. not that many people would hire someone for being able to go and take a quick snapshot of a pretty scene. things that grab peoples attention are things that have a lot of effort put into them, not just a large f-stop and a macro lens. are you just putting this portfolio together for fun for is it actually going to be used for applications or such?
if applications, you may want to add more types of photography like more portraiture or abstract kind of photos.
