all you have to do is not be afraid to speak your belief in non-metal music as being of equal artistic merit as metal for the purposes of expanding the minds of our more ignorant friends here at UM.
Aaaaaaand anyone who isn't an actual shithead believes this. I reiterate, what's the point?
I'm a firm believer in a forum full of punching bags...
EDIT:
Here's my favourite things to listen to:
Adramelch, Agalloch, Agathocles, Agent Steel, Amebix, Anael, Atheist, Autopsy, The Beatles, Bedemon, Beherit, Bifrost, Black Flag, Black Sabbath, David Bowie, Brocas Helm, Mr. Bungle, Burzum, Kate Bush, Camel, Captain Beyond, old Carcass, Celtic Frost, Circle Jerks, Clock DVA, Conception, Conflict, Converge, Coroner, Countess, Cruachan, Cryptic Slaughter, Dark Quarterer, Darkthrone, Dead Can Dance, The Dead Kennedys, Depeche Mode, Destroyer 666, Bruce Dickinson, Die Kreuzen, old Discharge, Dismember, DMX, Dr. Dre, Drudkh, Emerson Lake & Palmer, English Dogs, Esoteric, Exodus, old Fates Warning, Peter Gabriel, Godflesh, Gallhammer, Gorguts, Hail, Hammers of Misfortune, Hellhammer, Helstar, Hirax, Holy Terror, Immolation, Jag Panzer, Judas Priest, Killing Joke, King Crimson, KMFDM, Kreator, Laibach, LARD, Led Zeppelin, The Lord Weird Slough Feg, Manilla Road, Mayhem, The Melvins, The Ministry, The Misfits, Napalm Death, Neurosis, New York Dolls, NWOBHM, Ol Dirty Bastard, old Opeth, Overkill, Pentagram (CHL), Pentagram (US), Plastic Ono Band, Public Enemy, Queen, Radiohead, Repulsion, Roxy Music, Rudimentary Peni, Rvnning Wild, Rush, Sabbat (JPN), Sabbat (UK), Saint Vitus, Sauron (MMMM), The Smiths, Snoop Dog (first album), Sodom, SunnO))), Tangerine Dream, Terrorizer, Titan Force, Toxic Holocaust, Ulver, Van der Graaf Generator, Ved Buens Ende, Vio-Lence, Voivod, Warning, The Who, Witchtrap, YES, Frank Zappa and The Mothers of Invention, Zeke, and many more...
If I'm not well rounded because 60% of it is Metal, then you're just too picky. I post on a Metal forum because I enjoy Metal.