I suspect we grow up and hit on a music or band we like and follow it until it no longer satisfies. Then we cast around and it's like "what is all this noise?" as all we've listened to for the past months or years is what we liked and we find ourselves out of the comfort zone. Radio and charts are all self fulfilling as the promoters promote, nobody else gets a look in so all we hear on the radio is what is being promoted therefore the record buying public are being blinkered by the promoters and the radio stations that pander to them.
The best radio station in the world is Radio 2 here in the UK - they play classic rock, soul, 50's, 60's, 70's, 80's, 90's and 00's with equal gusto and enthusiasm. They also play some current popular stuff but not necessarily what gets in the charts and I don't know of another station anywhere where you could be listening to Dana singing 'All Kinds Of Everything' followed by something like 'Holidays In The Sun' by Sex Pistols which then segues into perhaps Muse playing live in Manchester Cathedral.
Your next big thing is out there, you just need to pay a little more attention
I'm the son of rage and love