Priest cinched it with heavy metal for me by the 1980's. Everything else to come after them just seemed so predictable that I ended up riding on the classics for years. I avoided punk, hair bands, and even Metallica bored me to tears. Thankfully, Ozzy and SRV, Satch and Vai had happened along and occupied a lot of my listening enough to where I was even able to avoid MTV after say, round 1.