hiho,
as some others allready said, there is too less variation, every building looks like the building next to it, but I know the problem: there are really too less futuristic models. I really like that you did the models yourself, and I really would like to ask if your street skin (/model ??) is available for downloads... is it? It's really usefull, because there no more asphalt models/ skins... well, I don't know more... maybe there are some... well, nice work all in all and think of uploading ( if you didn't yet) your asphalt tile.
-greetings, Pajam!