Interesting images, I like #2 and #4 - there is always a sense of mystery when the image has "lines" that lead into the image and then sort of fade into the picture; however, I am not sure about the B&W conversion (how was it done). Do you have a colour version you could post? The first one looks out of focus and a bit oversaturated and the third one does nothing for me. As a request, you would do yourself and reviewers a favour if you would number your images when you post them This makes it a lot easier for a reviewer to refer to an image, rather than having to flip back an forth to make sure they are commenting on the right one.
WesternGuy