I still have a fondness for black and white photography, duo-tones more specifically. I like what a blend of warm and cool tones can do to a monochromatic image. Add a nice modern building with reflective glass, an interesting sky, and the combination just works for me.
Another nice blend is black and white or duo-tone night images. I don’t often see many night shots done in black and white, and its refreshing when I do.
And below is another example, although I mixed back in just a tiny bit of color saturation to give is a slightly different look than a duo-tone, while still retaining the same look and feel.