I am going to base my architecture style on a Sci-fi futuristic city. The city could consist of a high tech environment, usually dark but with street lights(neons are common) These environments could be either grungy, cyber punkish or immaculate, smooth and shiny.
This is what I would describe as a clean, civilised future city environment
These two images would fit a rough, beat down style of a futuristic city.
This pictures is a good example of a a prosperous city, with a poor section just outside of the city. This shows a mixture of rich and poor, upper class and lower class.