Definitely Church Fenton 1971-72 - my first Mess and great people. Up there as well is Kinloss 1975/76 - again, a great bunch and lively 'livers in' who made it a joy to live there.
Most unusual - Fylingdales 1976>78 where there were only 2 livers-in, me and P*** H*********. There were more staff than livers-in!
DS