A quick background - I love Mercedes cars. As a kid my dad had one for a few years (incidentally, he hated it) and I always liked riding it. When we went to the dealership I would be drawn in by the pro-Mercedes anti-BMW propaganda.
When I bought my first car with my own money, it was a 1985 Mercedes 380SE. It was ten years old at the time, was the first car I'd even test driven, but I really loved the car. Even though it was so old it had good features and was fun to drive. Two months later, it broke.
Several years later I bought my second Mercedes, a 1994 E320 Coupe. I've always been a huge fan of the Mercedes Coupes. For one they have really cool four place seating, so instead of three squished seats in the back you have two full ones with a console in the middle. Their lines are beautiful, and they're fairly rare. I actually still have that car, although my brother, Devon, drives it right now.
One of my overarching goals in how I present myself is to be consistent. Although the relationships I have with my family, friends, acquaintances, and random people on the internet is always going to be different, I try to be the same person with all of those groups. I think authenticity is important, and this consistency is a sign of authenticity.
Try as I might, though, people who read my stuff online and then meet me in person are consistently surprised that I'm actually a happy guy who jokes around a lot and is more human than robot. I see why people expect me to be different, though. My writing tends to be serious and I'm always talking about habits or rules or working hard.
Although all of this rigidity is a big part of my life, it's also just the foundation. From the rigid parts of my life I'm able to get a tremendous amount of work done, keep myself healthy, and move towards my goals. But there's also a lot that it can't do. Rigidity doesn't build relationships or spark creativity, two important parts of life.
I think you learn a lot about someone when you see what he does when there's nothing he has to do. And I think by changing what you do when you have nothing to do, you can change what sort of person you are. I design my life to have as few as possible externally-dictated things that I absolutely have to do, and I create systems to fill that void. Every day I have sixteen hours ahead of me, and no one to tell me what to do in that time except myself.