I saw AC/DC perform live in Seattle when Bond Scott was still alive. It was before they were a name, they opened for Ted Nugent. They carried Angus around on their shoulders in the crowd during his "Whole Lotta Rosie" solo. I'm a rock guitarist, and I knew AC/DC was going to be hot when I first saw them. I don't even know their new lead singers name - I just know I can't stand him.
Not really into Iron Maiden, they seem to copy Judas Priest's style too much. Kansas - their "Dust in the Wind" hit, was actually plagiarized from my former girlfriend's father.