I love Heavy metal!!! Nickelback is not heavy and Nirvana's first two albums have some heavier stuff but that?s most of it.
Metallica rules!!! The best heavy metal band in the world!!! Amazing catalogue of songs!! Master Of Puppets, Seek And Destroy, Creeping Death, The Four Horsemen, For Whom The Bell Tolls are just unbeatable, specially live!!
u2zoogirl knows what she's talking about, Black Sabbath is another great band with a great catalogue of songs!! The first three albums are the originators of heavy metal!! Kreator and Slayer are more trash metal and they kick ass too.
Another great metal band that doesn?t get much attention is Testament. They?re great too. Sepultura must be mentioned cause they?re a very important band for today?s heavy metal. There are others too like Anthrax, the almighty Motorhead (you?ll love them), Megadeth, Pantera, Mercyful Fate...