What I like in black and white film is real documentary footage of WW2.
Also off the topic but as I was born in the 1950s and saw a time when lots of people didn't yet own a tv and those that did had to put up big antennas on top of their house and as far as I knew all TV was black and white. I was recently surprised to see that in the early 60s "I dream of Genie" and "Bewitched" and other shows that I always had known in black and white were actually in color. Who knew?