i think i can sum up all of your photo issues (from my point of view) in two things. number one, take the same pics, just from different places. dont be afraid to lay down on the street to get a good pic of a fire hydrant, or a trash can, that kind of thing. try to avoid taking shots at eye level unless you are trying to use that as a sign that you are the viewer as a human on the spot. number two, contrast. i think more contrast would do almost all of your shots a lot of good. they seem pretty flat for the most part, and i think that would really help them out.
take it for what its worth, could be a lot, could be nothing, thats just how i see it.
keep posting stuff, im enjoying seeing what you come up with!