One of the best things about bike commuting is, well, not having to drive home.
I'm physically, mentally, and emotionally drained. But at least I don't have to attempt to operate a multi ton machine capable of killing people the moment I let my guard down.
@DrTCombs And I don't know about you, but I often find that my heart rate goes *down* for the first few minutes of my ride home, because biking feels good. Can't say that about driving at commute time!