This sad little lizard told me that he was a brontosaurus on his mother's side. I did not laugh; people who boast of ancestry often have little else to sustain them. Humoring them costs nothing and adds to happiness in a world in which happiness is in short supply.
Lazarus Long - Time Enough for Love
One of my favorite all time characters from Heinlein...or anyone.
I especially liked "The Cat Who Walks Through Walls".