yeah when my girlfriend started commuting her biggest joy was that we could actually leave whenever we wanted as opposed to waiting for a bus which rarely comes on time sometimes, and never on your schedule. we cruise to work pretty much independently of the hellish traffic jams that can occur and always end up at work or home consistantly.
if you get a flat or other minor mechanical your maybe 5-10 minutes late... she got stuck in traffic on the bus for an extra half or so hour at least once a week.
biking to work is PURE FREEDOM! especailly compared to public transportation...
one of the reasons i think i am so addicted to commuting is because i know what a pain in the @ss taking the bus is compared to just pedalling in.