Yes, I tried a variety of exposure/aperture combinations to bring out the concrete jungle, but that stinking floodlight always made it hard... non-SLR, you know. And I like clarity, even at night, so I never shoot above ISO 50 or 100. I'm still learning.
Camillo, those downtown daytime scenes are glamour shots, like it or not. They have a very crisp, almost vintage postcard quality to them: they remind me of all the photos taken in the 1950s and 60s that were still being used in the 1980s World Book Encyclopedia edition I used to pore over as a child. Is the effect all post-production (saturation and color balance), or are you shooting with a UV or polarizing filter as well? Either way, I'd love to see some of your Europe photos.