My girlfriend has pretty much had the same 150 core songs on her phone for years now. Every now and then she'll listen to 30 second samples from a new album, pick the ones that she likes the sound of, download them, and NEVER attempt to listen to the songs who samples she didn't initially like ever again. Whereas I will give songs I don't initially like a few tries to see if they grow on me. And even then, I only buy full albums and if I listen through, I'll still listen to those songs I dislike just because they're there.
I think she's probably the more normal one, whereas I obsess over music and usually make it part of everything I do. Music is just more important to me than it is to her.