[Vautrin]

subway, sky train, bus, or taxi?

I am not too fond of subways. Too many people.
Planes - way too little space.
Train - I tend to get drowsy.
Bus - My running joke on buses is that every 15 miles means I need one additional replacement kidney.
Taxi - too expensive.

I'd pick the train.

As for walking, I am always up for that, provided I am not freezing to death, or in a rush. Sometimes walking is quicker than depending on public transport - during the day.