Great job! Clyde here, as well...6'1"; 230lbs...route is 14 miles round-trip...it sounds like it's already becoming second-nature for you! It's a good feeling. On days when I don't ride (fair-weather commuter), I drag a bit...but on days when I ride in, I'm 100% energy until I land on the couch at home after 5. Since I started bike commuting, I've ditched the CPAP machine and slept better than ever before. Pretty much everything has improved now that I'm not riding around in my car. And of course, I save on gas money.

Two quick suggestions: I'd suggest letting a trunk rack carry the commuting weight for you, but all that aside, let me suggest one cheap method of lighting your way: Cree LED. I think sometimes these lights are hit-or-miss, but I got mine for $25 and it has performed like a champ for several months. I strap it to the handlebars, nestle the battery pack right up against the head tube, and I go!