I think most of us value our bicycle commutes for a number of reasons, mostly positive. We get some exercise, get to know our cities better, and, most importantly, we have fun! Our friends at 511.org remind us that by biking to work, we're also missing out on the daily slog through traffic, costly gasoline, and, of course, the hazards of stale pastries.
Check out their video, "How Was Your Commute Today?" at http://www.youtube.com/watch?v=otafJWlSj_4