first vinyl album I bought: Van Halen - Women & Children First
first rock concert I attended - Van Halen in 1982
first cassette I bought - Van Halen - 1984 (ended up being one of maybe three cassettes I ever bought)
first CD I bought - Van Halen - 5150 (by this time it was strictly for tradition)
first mp3 I downloaded - Van Halen - You Really Got Me
unfortunately, the first 45 I bought, back in the 70s was some single from the Grease soundtrack. That was before I knew who Van Halen was.
Grease is the word!