Where we lived before the postman was not so pleasant. He constantly trampled through my gardens even when I politely asked him not to. If we didn't shovel a path across our lawn, yes across our lawn, sometimes he wouldn't deliver the mail if he deemed too much snow. We live in the southern midwest so our snowfal is like 1-3 inches a time mind you, not like Minnesota. So we never gave him anything other than a piece of our minds.
But we just moved and the postwoman is so nice and helpful and goes out of her way. She remembered our names after just one meeting and all the neighbors love her and talk to her, so I'm thinking about letting the kids make her christmas cards this year.