I like relaxed sets. I like to feel that I can make a mistake without feeling like I'm costing somebody money. I like a sense of freedom. I like it when people are open and are willing to let you do your work.
And then finally, I'm the commander, so I am fundamentally responsible for the lives of the other people on board and the health and longevity of the space station. I need to bring six people back happy, healthy and feeling like they've had the best six months of their life.