I used to fly Alitalia quite a lot (only because they gave me free tickets!) between JNB/NBO/ROM/LON. Invariably people used to clap when we landed, specially after a long sector. Sometimes we landed four or five times on the same flight, people would usually wait for the last bounce before clapping, and I remember the only thing about AZ that was better than lousy was their food which was rermarkably good.