With more than 12,000 General Aviation, Military, Legacy Pax Carrier and Major Cargo Airline hours now, I know absolutely nothing about Part 91 flying ...

Do they have a "Flight Department"? Who does their flight plans (I wouldn't want to be filing an International Flight Plan over the Internet at midnight the night before a 10 hour flight).

It would be nice to be flying a G550 around the world. Who takes care of catering and baggage handling. Who's responsible for aircraft maintenance and logbooks?

Do FBO's do all the ground handling around the world when not at home base?

Personally, I think it's kind of nice to show up an hour prior to my departure, review the provided paperwork, preflight and depart. Is it a similar gig for the major Corporate jobs?