A musical regret of mine:

I never heard Frankie Knuckles when he was around DJing in the city I live in.

He's known as the "Godfather of House," and I knew that from a(n Irish) friend who follows house music and had told me of its history at some point, and Moby talks about him in his memoir, but I never followed club listings and so I never got out to see him at his random appearances before he died like this past year.

Now, I feel bad about that.