Ha.
Back when I was getting hardcore into older music I asked my dad (who pretty much saw everyone who was great from '68-'78) about them and he said "they sucked". Years later when I finally got into them*, and I slipped some of their tunes in his mp3 player and he told me he liked the stuff...and he asked who are they? I told him it was maiden and priest, and I was like WTHell, you said you didn't like them years ago?
He says "like them? I never heard them! i thought they were a religious band and a chick band!
*thanks to metallica covering bits of their tunes (i was collecting their live bootlegs). hilariously, it was dad who converted me to metallica (took the dive cause he liked the 'Justice' album cover)!