The biggest surprises I got were two gifts from a little girl.
I babysat her for years when she was a toddler. And I bought her lots of gifts--play dolls, other toys and trips to museums, schools, etc. Since she's reached 7, I no longer babysat her. I decided it was no longer a thing to do.
Surprisingly, this Christmas, I came home from an out-of-town relaxing trip, and two boxes of gifts were waiting for me. She and her mom had dropped them off. They were addressed to me from her: three pairs of warm socks and a sleep suit, just right for the winter.