But we asked our Facebook readers who they had met who had been pleasant to them – and loads of suggestions were made.
Here are some of those who make it into our nice hall of fame.
13. John Challis and Sue Holderness
Boycie and Marlene, as they are better known - 'Both lovely lovely people,' according to Charmain Conway. They are pictured here at an Only Fools and Horses convention at the Mountbatten Centre in 2011 (114045-9157) Photo: Sarah Standing
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