This is my current iTunes library, and I've highlighted my favorite bands.
Adele, Alexisonfire, Alice in Chains, Alien Ant Farm, The All-American Rejects, All That Remains, All Time Low, Angels & Airwaves, Animal Collective, Arcade Fire, Arctic Monkeys, Audioslave, Avenged Sevenfold, Avril Lavigne, Balance and Composure, Band of Horses, The Beatles, Beck, Beirut, Ben Folds, Ben Gibbard, Ben Rector, Billy Joel, The Black Keys, Black Lips, Blink-182, Bloc Party, Blue October, Bon Iver, Box Car Racer, Boys Like Girls, Brand New, Breaking Benjamin, Broken Social Scene, Bruno Mars, Cage the Elephant, Chevelle, Christina Grimmie, City & Colour, Coldplay, Daft Punk, Dashboard Confessional, Dave Matthews Band, Deadmau5, Death Cab for Cutie, The Decemberists, Deerhunter, Emery, Emily Haines, Emily Haines & the Soft Skeleton, Eminem, Explosions in the Sky, Fall Out Boy, Five for Fighting, Five Iron Frenzy, Fleet Foxes, Flight of the Conchords, Flo-Rida, Flobots, Florence + the Machine, Foo Fighters, Foster the People, Gary Jules, George Barnett, Goo Goo Dolls, Good Charlotte, Gorillaz, Green Day, Grizzly Bear, Hall & Oates, Imogen Heap, Incubus, Iron & Wine, Jack Johnson, The Jackson 5, James Taylor, Jane's Addiction, Kanye West, Jimmy Eat World, John Mayer, Justin Timberlake, Kamelot, Kate Nash, Katy Perry, Ke$ha, Kelly Clarkson, The Killers, Korn, Lady Gaga, Lamb of God, The Last Vegas, Led Zeppelin, Linkin Park, Lit, Manchester Orchestra, Maroon 5, Matchbox Twenty, Matt White, Metallica, Metric, MGMT, Michael Jackson, Modest Mouse, Morrissey, Motion City Soundtrack, Muse, My Chemical Romance, My Morning Jacket, Neon Trees, Neutral Milk Hotel, Nine Inch Nails, Nirvana, No Doubt, Oasis, Odi, OK Go, Oren Lavie, Owl City, Papa Roach, Paramore, Pearl Jam, Pink Floyd, The Postal Service, Primus, Queen, Queens of the Stone Age, Radiohead, Rage Against the Machine, Ray LaMontagne, Red Hot Chili Peppers, The Red Jumpsuit Apparaturs, Relient K, Rihanna, Rise Against, The Rolling Stones, Saosin, The Script, Sigur Ros, Simon & Garfunkel, Simple Plan, Smash Mouth, The Smashing Pumpkins, The Smiths, Snow Patrol, Soundgarden, Spur 58, Staind, Stars, Sublime, Sufjan Stevens, Sugar Ray, Sum 41, System of a Down, Taio Cruz, Taking Back Sunday, The Temper Trap, Temple of the Dog, Tenacious D, The Academy Is..., Them Crooked Vultures, They Might be Giants, Thousand Foot Krutch, Three Days Grace, Thrice, Tool, Trapt, Travie McCoy, U2, Vampire Weekend, Velvet Revolver, The Velvet Underground, The Verve, Weezer, Weird Al, The White Stripes, The Who, Wilco, The Wonder Years, Yeah Yeah Yeahs, 2Pac, 3 Doors Down, 30 Seconds to Mars, +44.