Opeth frontman Mikael Akerfeldt recently addressed the concept he considers most difficult for metal fans to grasp - change. Chatting with Metal Hammer, Mikael criticized the metal crowd for being close-minded, saying that "in metal, evolution doesn't seem to be that important. "I think most metal fans just want their Happy Meals served to them," the frontman added. "They don't really want to know about what they're getting. For a while, I thought metal was a more open-minded thing but I was wrong. Maybe it's different from country-to country." Akerfeldt elaborated further, "Don't get me wrong, I love metal, but I'm also open-minded. I admire some bands that do the same record over and over again - I wonder how they don't get bored! For us, and Anathema, it seems impossible for us to stay still." Also taking part in the interview was Daniel Cavanagh of Anathema. "Every band I've loved has moved forward," he explains. "All the world-class songwriters, whether it be Black Sabbath or Pink Floyd, have evolved. Maybe not AC/DC because they're perfect as they are! Bands like Porcupine Tree have continued that tradition. It's a mark of intelligence in music and genuine creativity." So where's your stance on this one - do you prefer experimentation or the well-tested formula? Share your thoughts in the comments.