In 1974 or 75, I was working at the San Antonio Municipal Auditorium for the Black Sabath concert and saw Ozzy for the first time - and heard their music. While I thought he was one of the ugliest Rockers (and strangest looking to boot), I became a fan then and STILL HAVE the vinyl album I bought the next day....and then the cassette....and finally, the CD.
Boy, just when you feel old, you get thrown back to the good old days. At least I still have my hair.....or at least some of it!
EDIT: Actually, it was "Paranoid" That I bought first. Now my age comes back to haunt me.