Sorry, I couldn't resist. Now on to the real C&C.
Honestly, none of them really pique my interest. They look like snapshots.
Like Overread said, 3 is interesting, but I'm not sure if I would find it interesting in all color or all BW. There's too much going on in 4. I can't really see anything that's the subject (I'm guessing the mess was the subject). There's nothing cohesive about it. I think B&W works for the last one, but the composition needs some work. I'd have moved the building a bit more to the right of the frame and maybe positioned myself a little more to the right so you can get more of the side of the building. But that's just me.