I used to take a flight almost every thursday from Burbank to San Diego when we were rebuilding the California Building in Balboa Park for a job meeting and take the payroll and PSA even held the flight for me a couple of times when I was still getting a ticket in the terminal and they were ready to take off.
It was even cheap, I think a round trip Burbank/San Diego was just under $14.
Those were indeed the days. Regarding both AirCal and PSA, I don't think I've ever experienced finer, friendlier service.