What constraint do you design your life around that might seem silly and easy to override to others but is really hard to violate for you? Eg: being vegetarian, a significant but perhaps comical-to-others phobia etc.
Mine have! But I guess I'm still having trouble understanding the difference you're getting at. Surely a phobia is acquired?
Here's mine: I don't eat (almost any) plants. It may seem silly, but it's a health constraint that would be harmful for me to violate.