I'm really not sure how to answer you're question. My appreciation for music began very young, in the early Sixties, but involved exposure to several styles that predated my birth as well as new styles that were just emerging. The Seventies were significant because that's when I really first began to choose my own music rather than relying on what others played, including the radio.
As I grew older, I developed appreciation for all kinds of music from all historical periods, and many different cultures.
Something about the blues (especially music based on Delta Blues), pulls at me more often than any other style. One thing I've noticed over the past ten years or so, that I didn't notice before, is that a lot of music I was drawn to before the year 2000 or so is actually blues rooted, but I didn't really notice at the time. These days I can hear the influence instantly if it's there, no matter how evolved or "morphed" it is.
It's almost as it my entire personality and bio-rhythms are "tuned" to the blues. It feels natural, and anything that's rooted it the blues is music I never have to be "in the mood to hear." Other styles I have to be in the mood for, but I can listen to anything blues-based at any time, in any mood. It's the only music that's like that for me.
I could answer "The Seventies" because that's WHEN I really started to go nuts listening, choosing and exploring music rabidly, but that would be misleading, because it wasn't necessarily "Seventies music" that did it for me. That just happened to be the decade in which it all began, and though a lot of Seventies music played a role in my appreciation, it wasn't necessarily the most important decade of music in terms of what came out then. In fact, I spent a lot of the Seventies discovering stuff that was already passe.
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I'm not likely to be around much longer. As before when I first signed up here years ago, I'm finding that after a long hiatus, and after only a few days back on here, I'm spending way too much time here again already. So I'm requesting my account be locked, banned or whatever. It's just time. Until then, well, I dunno...