The R32s are probably the last of the really well-built cars. You can feel how powerful they are when the train starts up, they have much better acceleration than any of the other types of cars. It's true that they are not as comfortable as the newer cars, but they still get the job done.
The R44s are pretty complicated cars since they were designed to be driven electronically. I like the R44 and R46 cars (although the R44 gets an edge because of the windscreens next to the doors inside the cars).
One of the reasons I love the NYC subway is because you can ride in so many different types of cars.
On the BMT and IND:
R32, R33, R40, R42 cars - the "old-time" subway look. Not very nice looking but very practical. These cars were built very well.
R44, R46 - elegant looking cars inside (in a 70's kind of way). Comfortable ride and still feels and sounds powerful.
R68 - Most modern of the old style subway cars. Not as nice as the R44/46 but still not too bad.
R143 - Modern looking and bright.
On the IRT:
R62 - old style cars
R142 - new style cars
(simple
)
"Please do not attempt to board the train until it has arrived in the station. Thank you."
"Use Track 5 for the 5:17 local train to Raritan which has just departed."