Couldn't tell how/why, but this one works for me well.

Fits the theme nicely, but doesn't really "wow" me.

wish the back of the train had more focus, but all in all, this is a great shot. love the grainy b/w.

Seeing the thumbnail I was prepared to be unimpressed, but viewed at full size this photo comes into its own. Love the grain and the gritty urban street photo feel. The burnt out highlights detract but otherwise I like it.

I really enjoy this image, specifically because it is urban. So many of the images thus far (understandably) focus on more natural settings, that it makes the urban subway (bus? train?) setting a surprise. I like the gritty texture as well, for it is fitting the nature of the location.