It's funny how our feelings change about music over time too. Undercover mentioned how he views some groups differently now. Through the lense of time, I seem to do the same. Back in the day, while my brother repeatedly spun albums by Led Zeppelin, The Who, Aerosmith, Boston, etc., I was kind of on-board but never shared his enthusiasm. Yet now I find that some of their stuff was really pretty good.
I was in my late teens during the Disco era and essentially hated the stuff, but now I look back and find a certain charm in at least some of it.
Another couple of bands I still don't "get" though: Kansas (except for Carry On My Wayward Son) and REO Speedwagon (I call them "Air Supply with an edge"). Foreigner and Styx never thrilled me either except for songs such as Double Vision and Renegade.
I've also come to realize over time how much the music of Motown has influenced my musical taste. I have a special affection for a lot of stuff that came out on the Motown label or was featured on Soul Train.