Weightless is a great equalizer.
One thing I probably share with everyone else in the astronaut office is composure.
Even though NASA tries to simulate launch, and we practice in simulators, it's not the same - it's not even close to the same.
So I decided on science when I was in college.
I felt very honored, and I knew that people would be watching very closely, and I felt it was very, very important that I do a good job.
If they asked me if I wanted to go into space tomorrow, I'd do it in a heartbeat. On the other hand, if they asked me if I wanted to go into training for three years and then go into space again, I'd probably say no.