I really like punk rock that developed from the mid-1970s.
SO do I. I am not sure if Metallica was punk rock, but its a band that I really liked in the 90s.
They were more metal. Punk rock songs tended to be shorter and fast-paced with stripped down instrumentals.
Oh I see, do you know any examples or albums of punk rock?
For real punk rock you can check out the Saints, the Clash, or the Damned in London.
Damned in London sounds very exciting! I might try it. So why do you like punk rock?
I really like the whole DIY that goes along with punk rock. A lot of the bands self-produced and distributed their music. They also went through independent labels. 
I bet that it adds to their uniqueness! I wonder if there is anything else about punk rock which I might like.