Most of my coworkers don't even think of taking the train because they live in the 'burbs. In fact, the Acela from Boston to NYC would be a lot faster if it didn't have to stop at every suburban station outside of Boston when coming/going. But I guess that's where people live, so we have to stop and pick 'em up.

I take the Acela once a week from Boston to NYC, one day turn-around, for work. Since I live in Boston and Penn Station is convenient to my office in NYC, the train is the best option - not to mention, I don't have to sit in a cab frantic about getting back to LaGuardia on time for the shuttle. The Acela is also [marginally] cheaper. But rail just doesn't seem to occur to other associates, as it is no more convenient than air travel. I wish it weren't so (or do I? because I can sometimes have a whole row to myself on the way home, muhahaha; legroom).