Every character I've ever played, I always try to take him right to the edge and not allow him to fall over, but directors have a tendency to pull me back a little bit.
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.