There are quite a few...the charmed old man who tells you that you look just as his mother did as she was getting ready to paint the town red with his dad; the dance partner who tells you about his aunt, who worked in the airplane factory; the wonderful things people pass on from Great-Auntie Muriel's estate, "because you'll appreciate it". Those are all lovely.
Here's another: my hairdresser just offered to trade services. She'll do my hair for free next time if I'll show her the mysteries of a set with rag curlers. It's a wonderful offer.
I've been going to her salon for a few years now. Not often, because I tend to color and cut my own hair most of the time, and having had very long hair at one point (knee length) I grew up regarding salons as a luxury, not a necessity. But she always does a gorgeous job on cuts, colors, and blow-outs. Sets and putting hair up aren't really her thing, but she's growing her own hair out now, and has found that she wants to experiment a bit.
It's flattering and really nice of her. She even suggested we do this on a Sunday, so we've got lots of time for it.
Chalk up another advantage to eccentricity!