I remember this because it was about something I am really self-conscious about--my voice. I have a very distinctive voice, and I sometimes really hate it; people will recognize me by it after a single meeting, and if there's a few people talking, it's always me they hear. So I was at work and a customer told me that I had a perfectly adorable voice and should do commercials, I was very happy!
I used to dye my hair a lot of odd colours, and would get lots of comments on it, often on the line of 'You have blue hair!' The one I remember most was a fiftyish corporate woman who approached me in a Starbucks and started talking to me, telling me how she had always wanted to dye her hair hot pink, like mine was at the time. She told me how she was retiring soon, and once she did, she would try out lots of different colours. It was such a fun conversation, and a real 'appearances can be deceiving' moment.