Nigel
Out of these I like No. 2 & 3 best.
With No.2 I am drawn to the sharpness of the bottle and wonder what the gentleman is reading. The picture tells a story to me.
With No. 3 I just like the casual unhurried nature of the smoker compared with the people in the background. Them being out of focus almost seems to me to make look as of they haven't got the time.
I also had a brief look at your flickr pages and like the picture entitled red.
http://www.flickr.com/photos/wildberrys/4732007987/Only two major tones in this but certainly wouldn't have the same impact without them.
Look forward to others views.
I'm not sure why you feel your not happy with anything you are shooting, If any of these images are taken in this stage, I think they are all good.
You do not mention if this is judged show or just showing for pleasure, either way what ever you choose good luck.
Regards
Mike