In Flames' "Reroute to Remain" and "Colony" album pulled me into metal, but I consider myself kind of selective of the bands I listen to. From there I got into Killswitch Engage, Amon Amarth, and just a handful of songs from Lamb of God.
Used to listen to bands like Dragonforce and Disturbed, (which I still listen to a few favorites from the latter) but lately I find myself looking into metal bands with female lead singers. Old Nightwish, Unsun, Amaranthe, and Delain as well(though I'm sure if Delain is trying to be metal anymore, still good though
I still listen to other genres of rock: Songs from X Japan like I.V.
& Silent Jealousy
, or When You Were Young
by the Killers.
Haven't really looked back since