Le Great Handsome Oppressor wrote:
If you wanna hear some good Metal, you should go for the older, good stuff. On the top of my head, bands like Iron Maiden, Scorpions, Black Sabbath, Megadeth, DIO, Anvil, Def Lepard, Motley Crue, Machine Head, Twisted Sisters, Aerosmith, Rage Against the Machine, Judas Priest, Jane's Addiction, Slayer, Metallica, Van Halen, Suicidal Tendencies, Alice Cooper, Pantera, Guns N' Roses, and even older stuff like Hendrix, Deep Purple, Led Zep.
Starting with more recent stuff like Dragon Force, Children of Boddom, Rammstein, Slipknot, Korn, that's no good. I mean they're not bad bands, but it's not what Metal is all about, and starting with the older bands in my opinion gives you a more solid base of comparison. There's a lot more. There's a lot of art to be found in the older stuff that is extremely interesting and really just badass and sounding good.
In my opinion, while it's okay to listen to more mainstream and commercialized stuff like the bands you mentioned, because they are often in fact good, metal is definitely a genre that you will get the most out of if you explore beyond what's played on the radio. Digging older stuff is a matter of taste - I have never really listened to many of the 'classic' bands you mentioned but rather tried several different sub-genres, stuff that friends suggested and so on. Last.fm has also helped me find new bands.