ATIS at Coolangatta a few years ago when the tower supervisor turned up for work in a bad mood "This is Coolangatta information Grumpy........."
Apparently he heard it and cheered up so the next recording became......Happy!
Until, that was, some miserable bastard of an Ansett captain threatened to report them for non-standard phraseology
Didn't stop the rest of us. For weeks afterward any ATIS with a letter corresponding to the seven dwarves was fair game.