I'm just not that into it

Something I hear a lot when discussing music with people is "oh, I'm just not into..." followed by whatever genre of music I've been talking about, whether it be hip hop, metal, reggae, or just good old New Zealand music. It's always a little disappointing to find someone who wants to talk about music, or at least wants to listen to me talk about music, and then find that they've closed their mind off to whole pieces of the musical world.