I don't go out on road regularly (usually only during peak), but I always enjoyed watching the lonely old office ladies go nuts over their regular driver, and make lame jokes about delivering his package. It only gets old after the billionth time.
I had one lady ask if I could wait a second because I interrupted her soaps.
And I delivered a package in a rough section of town once - when I knocked, the guy opened the door with the chain on and asked if I was the police. When I said I wasn't, he said "You sure do knock like the police."