There's virtually no course that hasn't contributed to my success. Every one of those classes, no matter how weird and esoteric, no matter how far away from where I thought I was going in life, has been crucial - religion, computer science, theatre, literature, biology. I've used everything. Understandably, Muller's lifestyle draws envy from many. Well, there's a downside.
Relationships are almost impossible.
You can't have a pet. You get one check every two years, and if you screw it up, you don't get that check. You're moving constantly. You're chasing your career. You have no roots.