Freedom.
Rotating and remembering the days (or at least I do as a kid) staring out the window of a jet and seeing the ground rush away from you and the clouds get closer and closer, imagining what it'd be like to get to do this every day (!)
Looking down on the average population and realising how lucky we are to get to see things day in and day out that the punters only wish they could.
And absolutely, the opportunity to continually increase your own precision and perfection (or at least, attempt to do so).