Some nicely composed shots - well done. 
No2 is a real crackin' shot with loads of impact and a super range of light and tones. 
No6 too, but not sure portrait format was the best choice .

I feel the others lack some impact though they are well composed. Your experience with render software obviously has a great impact in that. Your Lightwave images in the gallery are so outstanding I guess it just makes me wish these could match it in dynamic range and colour. Perhaps this is a reason you have chosen b/w for some of them ? 
These are my own personal feelings and thoughts on seeing the images, you may have got just what you set out to achieve in which case my comments are irrelevant.

Shifting the white balance about is very effective in photography where there is a mixtures of artificial lights and could add some wow factor. Shooting a series of shots with different shutter speeds and combining them with HDR software would also bring out hidden detail in images that lack a tonal range or are just too contrasty (eg No3).

Well that's my first thoughts on seeing the images.

I like the shots and I think they are a credit to your camera skills.  As they are, they make a fine collection of city nightscapes to be proud of, you would be hard pressed to find better shots in many publications of this type of work.

hth
Richard. 

And every one said, 'If we only live,
We too will go to sea in a Sieve,---
To the hills of the Chankly Bore!'
Far and few, far and few, Are the lands where the Jumblies live;
Their heads are green, and their hands are blue, And they went to sea in a Sieve.

Edward Lear
http://www.nonsenselit.org/Lear/ns/jumblies.html