Music recommendation is a relatively easy problem on one level, and a huge problem on another. If you are recommending music to a neophyte of a certain genre, w

Music recommendation is a relatively easy problem on one level, and a huge problem on another. If you are recommending music to a neophyte of a certain genre, we've clearly been able to do this for awhile in a way that has real value. But if you're trying to recommend music for someone who is an expert/aficionado of a certain genre, this inevitably annoys that sort of person. For the 2nd type of recommendation, it's hard to provide results of actual interest. Instead, you wind up getting recommendations for pale imitations of things you like. The 2nd problem might require something close to hard sentient AI to accomplish.