I guess my household was a little different than most. My mother was a "rocker", when I was very young (early 70's) the music playing around the house was Led Zeppelin, Hendrix, Black Sabbath, Deep Purple, CSN&Y, Pink Floyd, etc. I LOVED it and thought she was quite hip for liking it as well.
Our tastes didn't diverge until I started listening to KISS in 1976 and she hated them...probably because she could tell that it was completely pre-packaged product masquerading as a serious rock band.
Fast forward to around 1980 and I was listening to alot of Queen, AC/DC, Rush, etc. She liked all that stuff as well and was instantly hip again in my eyes.
Our paths started to diverge again around 1983 when I got heavily into NWOBHM bands like Iron Maiden, Judas Priest, Motorhead, Venom...and also the infant thrash scene in the states: Slayer, Exodus, Anthrax, Metallica. She mostly hated these bands...but Metallica ended up finally growing on her to the point where she'd at least tolerate it...and she actually really liked Judas Priest.
Then we got on the same page again when I became a rabid King's X fan, she absolutely loved them and went with me to a couple of their concerts. We also went and saw Faith No More together around the same time. The last band I remember us both liking was Soundgarden.
Then I started listening to jazz...we haven't been on the same page...hell, even the same BOOK since then! She thinks I'm horribly "un-hip" for listening to jazz.