Metallica were easily the best, most influential heavy metal band of the '80s and '90s. Responsible for bringing the genre back to earth, the bandmates looked and talked like they were from the street, shunning the usual rock star games of metal musicians during the mid-'80s pop-metal renaissance. Metallica also expanded the limits of thrash, using speed and volume not for their own sake, but to enhance their intricately structured compositions. The release of 1983's Kill 'Em All marked the beginning of the legitimization of heavy metal's underground, bringing new complexity a...