Passengers face each other, like they do on the New York subway. The passengers are a strange mix. You have businessmen sitting next to college students across from moms taking their babies to the doctor. Supposedly there's something psychological about a train. People who would never dream of riding a bus happily park their cars on the outskirts of town and hop a train to work.
Stockbrokers can ponder their portfolios.
Lawyers use the commute as billable time. Those guys don't miss a trick. People treat a train with respect. They may leave a newspaper behind on a bus, but they take it with them from the train. There's no eating, smoking, drinking or loud music.