I love this but i am a sucker for old industrial stuff. I can't even say which one I like best. If i try to be objective i will say that 1 and 3 are the best. Something is throwing me off on the second one. Did you crop it?
It's funny how i used to have a problem the composition on my DSLR because i was used to the more squared format of the P&S. Now when i see something a little too squared it batters me... It's all conditioning!