I do like a few of the bands you mentioned (All That Remains, Avenged Sevenfold, A Day to Remember, Killswitch Engage, Slipknot & Three Days Grace), but I'm definately not a metal head

Some of my favorites are...Disturbed, Godsmack, Mushroomhead, Volbeat, Mudvayne, Rob Zombie, Marilyn Manson, Black Label Society, Five Finger Deathpunch.