Eja: In fact, I do, but they're about the only variety in the trains I see. I follow NS for about 12 miles on the way to work, and while there are occasional merchandise trains, most are "unit trains" of one type or another. Coal, tankcars, autoracks, stack trains. The closest to the trains I remember from the 70s are the stack trains, with the various container companies substituting for the variety of railroads back then. But they're still boring.
Due to work locations, I saw very few trains from the mid-80s to 2012, so missed the transition from loose-car railroading to today's unit trains. I knew it happened, of course, from reading magazines, but didn't actually SEE it happening.