There is so much great music in the world that I hate to try to list my favorites (and it is a long list).
Genres: Rock, hard rock, pop, j-rock, j-pop, dance, electronica, classical crossover, show tunes (b-way), metal, goth, punk, adult alternative, alternative, soft pop, comedy music, anime/video-game soundtracks, and more.
Groups/singers: Within Temptation, Lacuna Coil, Evanescence, Linkin Park, Tokio Hotel, Sarah Brightman, Idina Menzel, cast of Wicked, cast of RENT, 2005 revival cast of Sweeney Todd, Darren Hayes, t.a.t.u, Good Charlotte, Nightwish, Nickelback, Seether, Weird Al, Pink, Crossfade, AFI, Alex Parks, Atreyu, Bon Jovi, Boys Like Girls, Breaking Benjamin, Eminem, Escape the Fate, Flyleaf, I Am Ghost, Paramore, Saving Jane, Sarah McLachlan, Scary Kids Scaring Kids, Skillet, Stone Sour, Superchick, Maximum the Hormone, Death Note soundtrack, Hikaru Utada, Mucc, D'espairsRay, The Underneath, etc, etc, etc. (as you can see, I like A LOT of music)
Wanna listen to my music? http://www.finetune.com/user/Musicluver1991