I have a last.fm account so here's a list of 50 bands that I've listened to the most in a year(Most played down to last):
Rush, Pain of Salvation, Dream Theater, Sonata Arctica, Fates Warning, Genesis, Skinny Puppy, Akercocke, KMFDM, Between the Buried and Me, Yes, Elton John, Pink Floyd, Iron Maiden, Flotsam and Jetsam, Deltron 3030, Ayreon, Stratovarius, Pixies, Led Zeppelin, Marillion, Queensrÿche, Opeth, Coheed and Cambria, Children of Bodom, King Crimson, Porcupine Tree, Enchant, Metallica, Black Sabbath, Emerson, Lake & Palmer, All That Remains, Megadeth, Judas Priest, Fleetwood Mac, The Mars Volta, Kansas, Nine Inch Nails, Kreator, Pantera, Nightwish, The Seatbelts, Sepultura, Beck, Dio, Return to Forever, Muse, Tool, Spock's Beard, Symphony X