“Most of the playlists I make are for passionate music fans who have an appetite that leans toward discovery rather than songs they already know,” Mr. Vener continued. “However, this seems to backfire on me a lot with casual music fans. They want the hits. If you’re trying to make a playlist for everyone, I subscribe to something I heard from George Clooney on how he chooses which movies to make: ‘Two for them (his fans), one for you.’”
From How to Make the Perfect Playlist in the New York Times.