I like black, but as a challenge to myself I've not used it in recent paintings. The challenge I set up was to make other colors as rich and close to black without using black itself in the painting. I may use a little of it to darken a color a bit, but I havne't used straight black on the work alone. It's mainly for me because most people can't tell the difference at first. Once it's pointed out, thier perception of the piece is altered. When an area that is thought of as black is revealed to actually be a deep shade of red, it can alter how that area or even the whole piece is seen.
I've had it in my head to do a few paintings using mainly black, gray, and white but I haven't gotten around to it yet. I have done a couple of paintings in the past, both still lifes, that are composed of only black and white paint. I still have them and they are among my favorite paintings. I'd like to approach the idea again with newer images and see how it goes.