Never been a fan of CoF, though I can see why you'd still like them if they got you into metal.
Metallica was actually the band that got me into the whole genre of heavy metal, with help by Slayer, Maiden, Megadeth, and Sabbath. Amon Amarth just helped me get into Death Metal, mainly the vocals. I still listen to all those other bands, too.
Also: This song is awesome: