Used to spend too much time in airports and airline lounges. A few "characters" I met, in the sense that we did have a good conversation, were: Al McGuire (ex head coach of the Marquette basketball team), Richard Kiel (Jaws in a couple of Bond movies - nice guy and really enjoyed the conversation. A personality completely at odds with his imposing appearance), Ed McMahon (nervously waited for his new bride whose flight was delayed - he was old and she was quite young). I met others too, but not to the point of having a conversation with them.
Some of my older co-workers and relatives should have been famous based on the "work" they did in
WW2.