“M” has memorable bands like …
Machine Head, Mad Season, Manchester Orchestra, Manowar, Manic Street Preachers, Marcy Playground, Marilyn Manson, Massive Attack, Mastodon, Matchbox 20, Meat Loaf, Meat Puppets, Megadeth, Meshuggah, Metallica, MGMT, Midnight Oil, Ministry, Misfits, Moby, Modest Mouse, Motley Crue, Motorhead, Mudhoney, Mudvayne, Murderdolls, Muse, My Chemical Romance,
