Thanks Dagger, jo3pit and afiend for the comments!
jo3pit,
Settings varies from f/11-f/18, 6"-20",
Manual mode, AutoWB -1, Custom-curve tone
afiend,
These shots were sharpened in PS and the amount of USM, IMO, is for individual's taste and opinion.
I find that Sharpening is a necessary step in my post-processing work since I normally shoot in Normal or Auto Sharpening.
It may look over-sharpened to you but for me it looks just right for nightshots.