Don't forget the other beeps, different then the normal exit-row beep:

- Already Boarded (heard this one thanks to the GA who reassigned the seats after an equipment change, and had my name on the wrong seat, quite and interesting fiasco)

- Not on the flight (heard this one thanks to the GA who removed me from a flight assuming there was no way I was going to make the connection)

But, my favorite has to be the beep-beep-beep followed by the sweet sound of paper denoting that last minute upgrade I long ago had written off.