I'd fantasize about a duty such as a training position which would include about half the time on Earth at the academy, and the other half in space on a training mission.
I'll go along with this. I can't imagine that being cooped up on a ship with recycled air, no natural sunlight, etc. for very long would be healthy regardless of whatever advances in technology they come up with. Plus, the idea of being confined inside a ship for extended periods of time would drive me insane.