I used to deliver pizzas in undergrad and drove like a maniac to maximize tips. I still get in that mode when I'm behind the wheel, min/maxing what routes to take, how to hit the least lights and at the correct times. Driving is all about the destination for me. I'm not like this on a bike. It's about exploring different routes and taking my time. I sold my car so that I could enjoy my commute and my errands and not just be in a hurry to get there and back.