Really liking #2 and #4
#2 looks like you were in a bit of a precarious position, not often you get such a low view point with this type of shot
#4 looks almost Tron like with the tall buildings all lit up at the top, only slight thing i'm not keen on is the misty/foggy sky
I'd certainly be going back to shot #4 again if i were you when you have a more interesting sky, possible during the blue hour