Congrats on making it 5 years! That's determination and commitment! Most of us could learn a thing or two from you...

When I'm commuting, I think of it in terms of efficiency as well. I work out nearly daily, and when I commute, I can get a 1hr 10 min workout in (that's round trip) at the cost of 40 minutes (it would take me 30 minutes RT to drive).