While I have Master of Puppets and like it, I'm not that keen on Metallica as a whole.
I do like Iron Maiden, the old Maiden before Bruce joined them, Maiden is one of the few bands I have paid to go see rather than being paid to go and work at a concert.
My first introduction to the "heavier" side of music was Iron Butterfly's In A Gadda Da Vida
Then by way of Grand Funk Railroad's Live Album
Then a bit of the James Gang
And Budgie, who I got to meet most of the band members at a nightclub where they were playing as a new group called Tredegar
Also love Slade for doing things like this
Chlanna nan con thigibh a so's gheibh sibh feoil Sons of the hound come here and get flesh Clan Cameron