Correct, I don't have to. That never stopped me before though. If you want to be serious, a persons musical taste can provide a big insight into the type of person they are, how they behave, their mentality, maturity level, etc. If I meet someone who is a Wayne Shorter fan, I'll be quite inclined to get to know them more. If I meet someone who is a Good Charlotte fan, I'll laugh at them then stay as far the fu*k away as I can.