Just when you think you've matured into an eclectic bon vivant with complicated, unpredictable tastes, some techno geek has to go and ruin it. Retailers are now working on a formula for predicting musical tastes. So they can sell you more.
Customers who bought this theory also bought the new British formula for rating successful sitcoms. But maybe that's easier: "characters are witty, have different social status - and...they fall over a lot."