Yep Concorde for the enthusiasts, 747-400 if you wanted to retire worth millions (or pay off wives one and two).
Then of course, there's my chum who never married anyone, flew Concorde, got on the 777 when it started, did the French taxation thing and is now tax resident in Cyprus, teaching Air Vietnam how to fly the 777. Oh ... grrr!
(I'm due to meet up with him next week. I'll smack him in the mouth if he STILL maintains he'd have been better off as an actuary!)