Wondered what on earth I was gonna find with a title like that
I agree with Renee's comments. The light is very harsh and contrasty, with the exception of #3 which was obviously taken at a different time of day when the light was alot warmer. A very good attempt at what is a difficult subject
Personally I think you should try and get much as the fence in as possible. It gives you more of an idea of what is happening in the shot, and as central as possible - at the end of the day not much else should be happening or focused on in the picture.
Hackers bottom shot is superb.