Maybe everyone subconsciously tunes into certain musical aspects, I can can believe that most sane people won't have analysed this! Just as with eating some highly flavoured and spiced food, you can't appreciate all the ingredients but some predominate and catch your attention. I'm not entirely sure where I'm going with this but we must be filtering out some information so we can make sense of a music piece as a whole. I can imagine this is why a basic radio can sometimes be very enjoyable to listen to, it's not demanding too much of our brain to listen to it. However smart we think we are, there's only so much of the information hitting our senses that our brains can process in real-time.