I like number 3, only I wish it was more clear...seems blurry to me as well as grainy. Can't see EXIF info. Was it dark in there or something?
1. seems kinda neat...not sure if you just thought that would make a cool image...or if it is supposed to mean something.
as for 2, I can't really critique as I have not really been in a major city in some years and never shot one. I do like to look at it as a viewer though, I have a secret fetish with buildings...I like them.