I found some of the night shots of S602Z give a lot of yellow+orange glow, is it natural? I do not have the pic at hand now (sorry about that), but a good example is a road with even-spaced roadlights at night just after rain shower.
Another thing is that how to make the sky appear completely dark, as if i expose short, the main subject may not expose sufficiently, well if expose long enough, the sky apprear a little bit whiten up.
For candid shot in general, when you shot someone esle, what if they scold you? Arr... bad experience. Asking permission defeats the purpose.