Heard a good story of a Delta captain that was a few months away from retiring and was just starting a trip in ATL. There were long delays and after an hour of waiting in line he turns to his FO and says tell ground we need to go back to the gate. The FO asks why, but he just repeats that they need to go back to the gate. Once they get back and he sets the parking brake he says, that's it, I'm done and am going home.