Coleen Zaffar Hai - Executive Assitant Director (Retired) - Inflight Services shares her experiences.
You should possess a pleasing personality. You don't need to be beautiful in the conventional sense of the term. But you should be able to hold a conversation with anyone. By talking to them about their family background and such things I could judge whether the person will be likeable and get on with other people.
The most important thing is to be able to adjust to your customer. That's because everyday you are meeting a different passenger on the aircraft. They could be old, infirm, illiterate, irate, etc. We look for a pleasing personality, no crooked teeth, or cock-eyed.