There are a couple of threads such as:
Ten Perfect Songs
Albums That Changed Your Life
that got me thinking about things that I thought were life altering or things that I was passionate about that have now maybe cooled over the years.
For instance, I thought Michael Jackson's <i>Thriller</i> was the all-time best album ever ... when I was 12. I can hardly stand listening to it now, except maybe on a kitsch level. It was certainly a defining album for the time, but with 25 years on me I feel it on a different level now. Did it alter my life? Maybe. I can't really tell.
I also thought that Goth/Industrial was the best genre of music because it could be so raw and beautiful at the same time. 15 years later I have to ask: did these bands and albums change my life? Probably. Is it possible that I'd be the same person I am today if I'd never immersed myself in that scene? No.
So what do I like today? Music with passion, music with soul*, music with truth. It is hard for me to put either of the two things I mentioned above into any of these categories. Music (for me) is much more than stringing together a pretty melody and combining some vocal acrobatics. It has little to do with production. It has little to do with virtuosity. I know it when I hear it. That's all I can say. Does my own band have it? Maybe. I certainly play it like it does. That doesn't mean you'll hear it.
My point is: what albums, songs, bands, styles did you absolutely love 25 years ago that you can't really stand today (or just don't care for)? 15 years ago? 10 years ago? Did those things actually change your life? How different is what you listen to today? What were your criteria for "good" music in the past? What criteria do you use now?
*not the Stax/MoTown soul(tm) ... although some of that music has it.