I just don't work in black & white very much, which is a little ironic considering that a big portion of my pre-digital career was spent perfecting those very skills. There was intense craftsmanship to it all: a wide range of films, all with very definite personalities; filter and exposure techniques to master (can't get Zone System out of mind, even now); developing and printing techniques to bring out what you saw (or thought you saw) in the camera. All heady stuff.
One thing is, I just haven't gotten around to setting my cameras to work in monochrome, so I look for color and then try to make conversions in software. Those who do work in monochrome consistently produce outstanding images; my studio mate Whitney and my brother Jim both come to mind. So what I've been exploring recently are those images that are very monochromatic in nature, so a natural exposure doesn't reveal very much color information to start with. Then -- just like in the "old" days -- I start to see the dominance of texture and the power of design instead.
Years and years ago, I had the pleasure of working with an old photographer who taught me as much about life as about photography. He told me that every new technique you master is another hammer in your toolbox that you can use to pound little pieces of reality into shape.
I've never stopped collecting hammers.