The problem with this image is that it is TOO dark. The best time for these sort of shots is to take them slightly after sunset (or before sunrise) when there is a small amount of light in the sky. Not much is needed as a long exposure will soon pick up on even the slightest of lights. This still gives the impression of dark but brings more life into an image such as this.
Hope that helps.
I like this, the 2 colours go very well, not very often you see b&w images go that well
I'd maybe crop a bit more off the bottom. Get rid of that black space.
I love the shot though, I really do like it.
I used to work in the building on the very left of the picture
Did you do any post processing?