Hi Kevin,
First of all, I think you made it pretty transparent that you were out LOOKING for things to shoot, and trying to learn more, and train your eye. It was more than obvious, by the title of your thread that you never considered these to be hanging in art shops all around town. I saw the post as one for getting feedback.
Which brought up an interesting discussion between Bitter Jeweler and and Gina. I thought both people really had some great debate points. Sorry it turned into a nightmare for you. I'm sure a lot of people feel your pain on that one. (not Gina and Bitter. I think that was really a great discussion).
Anyhoo, here is how I think about it. I think at least you got up, walked around, got in some good practice, and tried to train your eye. Further, you came here, into what can sometimes be a pretty frightening place, prone with scary monsters at times, and ASKED for advice on ways you could improve. Right there you are batting 1000, as far as I'm concerned.
And I agree with other posters, that practice makes perfect. No one gets any better sitting behind a computer screen talking smack about other people's photos.

So hang in there. I personally rather liked the chain link fence photos. I think with a new eye, a lot of the other photos could work as well. Next time you go out, try to figure out totally new ways to shoot the stuff you see every day.
I need to do more of that myself. Anyhoo, I just wanted to give you a big hug.