Train is the most comfortable way of traveling. And also the most interesting because all kinds of people drive by train. It's mostly dependant on day's time I think. Very early in the mornings there are lots of suits. A bit later lazy students and people without work occupy the trains. Around high-noon until maybe 14:00, older people travel and at 16:00 the suits ride home. After that there is a bit of a mixture, but as soon as the clock shows 20:00, really strange people sometimes carrying strange equipment, are the train's kings.