Bet some of you have some good ones. I've had experiences ranging from an invitation long ago to the mile-high club (a female thank god) to watching people get clapped in irons upon arriving at destination.
Hardest landing: AirIndia 747, heavy t-storm, JFK in midst of Reagan air controller strike.
Best Lightshow: JAL, north of Fairbanks, aurora borealis, 1989. A couple of years ago, I read in Nat'l Geographic that this particular night had the most intense northern lights in something like 50 years.
Pre-Sep 11 Innocence: Swissair pilots let my wife and I tour the 747 cockpit in-flight over the Atlantic.