music, video games, movies, disc golf, 420 (not necessarily in that order)

metal: Slipknot, Disturbed, As I Lay Dying, DevilDriver, All That Remains, Five Finger Death Punch, Mudvayne, Ill Nino, KoRn, Avenged Sevenfold, Nonpoint, Straight Line Stitch, Chimaira, Killswitch Engage, Scar Symmetry, Coal Chamber, Spineshank, Fear Factory, Otep, Marilyn Manson, Trivium, Hatebreed, Children of Bodom, Dimmu Borgir, Kreator, Lamb of God, Cradle of Filth, Mushroomhead, Grendel, Mastadon, Metallica, Static-X, The Union Underground
(and many more...)

rock: Egypt Central, Element Eighty, System of A Down, Dark New Day, Breaking Benjamin, Evans Blue, Halestorm, Lacuna Coil, Sixx:A.M., Skillet, Tribal Ink, 10 Years, Flyleaf, Within Temptation, Disciple
(and many more...)

industrial: Sybreed, Godhead, Rammstein, Nine Inch Nails, Dope, Celldweller, Circle of Dust, Zeromancer, Emigrate, Mindless Self Indulgence, Ministry, Psyclon Nine, KMFDM
(and many more...)

alternative: Linkin Park, My Darkest Days, Poets of the Fall, HIM, Bowling For Soup
(and many more...)

metalcore: Bullet For My Valentine, Escape The Fate, The Devil Wears Prada

rapcore: Hollywood Undead, Deuce, Brokencyde

rapmetal: (hed) P.E.

electronic: Celldweller, Skrillex, Alien Vampires, X-Rx, Freakangel, Noisuf-X, X-Fusion, Grendel, Daft Punk, Unter Null, HexRx, God Module, DYM, Infected Mushroom, Paul Van Dyke
(and many more...)

horror, comedy, action, suspense/thriller

Kevin Smith, Jason Mewes