Joe, I never got far into studying the various types of NYC transit system cars. I actually lived over in New Jersey, where Public Service trolleys still ran up the hill from the 42nd Street Ferry and then down through Union City.
The Dyer Ave shuttle I became familiar with because of the need to ride it, and even though really young, I was fascinated by what were anachronisms even in the early 40's: open platform cars. While at high school, I rode the 3rd Ave occasionally for the same reason: they were unique.
I really don't want to go back and do it again, but to be able to stand to the side and observe is something that would interest me.