It's happening to me too. Recently, I've been listening to softer music. I still listen to my hip-hop, but it's more spaced out in terms of when I listen to it. The constant rotation is more Motown-era, or Celtic music like Enya. Sade, Keiko Matsui, Sting, etc. I guess it's about balance. The heavy and light have to be equal. So, I guess the light is getting heavier at the moment. I grew up on all the aforementioned artists, but my soul seems to be reaching out to it a lot more in my old age.