His list: 1. Black Sabbath 2. Iron Maiden 3. Metallica 4. Slayer 5. Opeth Opeth deserves a place among those gods! And here is the video if you want to watch the whole thing. I love the way Portnoy describes Opeth. If I wasn't familiar with Opeth, I'd definitely want to check them out based on his description alone. Cheers!