Commuted for a decade - never got stabbed, but got mugged a number of times. My parents told me repeatedly how fantastic catching the tram, train, bus etc. was - they loved catching it in on a Sunday at 11am and leaving around 2pm. They never did the 8am rush hour crunch or 6pm post-school commute. Public transport can be as fancy as you like, but if you need to travel via a rough area and the transport lacks security...