I have a 30 minute commute and I dread it every morning and every afternoon. I used to have a 10 minute one.
I'm not sure I could even imagine commuting six hours a day - that has to be soul crushing. And I love riding trains...
Tried the Transbay buses also; I can barely stay standing since the drivers seem to rapidly alternate between slamming on the brakes and flooring it. At least the acceleration curve on BART isn't designed to kill you.