Night photography is probably one of the hardest forms of photography to do properly. Depending on the result that you are trying to convey, each of the settings will be affected. There are two schools of thought on night photography. One states that you use aperture priority, the other states that you use manual. Either one will produce different results. Others will dictate that you shoot wide open, some will dictate that you stop down to f/8. Each of the tutorials that I've seen has had different settings and all in all, it becomes a confusing morass of "A said, B said".
As a beginning night photographer (actually this is the first time I've started doing night landscapes/city scapes), I'm wanting to learn the settings and I'm finding that with the differing opinions on what works in night photography, that I'm going to have to learn by trial and error.
The Shoppers Drug Mart at Central City - this shot was marred by raindrops on the lens casting unflattering droplets of light onto the whole image.
London Square - I tend to use "tungsten" if I want to project a cold vision on my night photography. Most will tend to use a warmer Kelvin number.
London Square - shot from my wife's work