The only problem I have with the subways are the obnoxious, annoying, inconsiderate people who ride them. I live in a mostly asian neighborhood, and by the time we pull out of the tunnel at 36th Street they all pull out their phones and talk to their relatives in Asia. I don't know why, but they think they have to talk louder being their relatives are so far away.
Then there are the people that hold the subway doors open forever. They stand there in the door so it won't close. They yell 'Hurry Up!' to their beloveds who are still at the other end of the train trying to hobble as quickly as they carry a kid and its carriage.
Then there are the goofball high schoolers who just spend their day on the trains running around, cursing, and being annoying.
Don't forget the beggars who travel car to car asking for change. Or the crammed cars full of smelly-post-work men. Or the crying babies, running babies, and mothers with annoying voices trying to calm them down.
I really don't enjoy the train. I do enjoy this train, though.