Sometimes we just don't get it ! Everybody is raving about a certain group or album. So we got out and buy it and give it a listen. After the inaugural play we just don't get it ! What's all the fuss about or that album was crap ! (or perhaps after we see them live in concert we appreciate them more than we ever did on CD).
Then we become downright persistent and listen to it again and maybe again. Finally it clicks in and you do get it and hold the album in reverance forever !
One example for me was Radiohead...now I can't get enough of them when I have time. With all the music available today it's difficult sometimes to give an artist more than one listen before dismising them entirely or appreciating them !