I have a 45-60 minute commute now. I hate it. Aggressive and distracted high speed drivers worry me perpetually... Not to mention the massive waste of time.
I agree, planes aren't usually too bad, people generally keep to themselves. I have to remember to dress less work-like and more punk-like, otherwise people think I look too approachable and get all chatty.
I did the commuter train for awhile back in college. It wasn't so bad, headphones and a book usually saved me. And I went during the rush, so panhandlers and catcallers usually went for women who made eye contact, instead of me.
I travel to San Francisco a couple times a year and use the commuter train there, too... It's usually a bit louder and smellier than the one in St. Louis, but, I can cope for a bit. I tried to walk as much as possible. I DO like the ferries there. The lines are crowded, but, the deck of the boat usually isn't, because of the chill and wind on the bay.
And, I agree, I usually walk a bit or wait for a less crowded car. Unfortunately, I'm still getting razzed by a colleague I ran into at the airport, who hadn't been there before so he was following me, and cars were so crowded I kept 'accidentally' missing them so we walked the whole way.