Black Flag was the first concert I saw without parental supervision. My mother was in an absolute frenzy of panic when I got home. Apparently there were 3 stabbings at the show I was at and I was clueless about it. She heard it on the news. The Rollins Bands first album is without a doubt the best one. I just wish he wasn't such a pretentious prick who writes shit poetry.
Husker Du is still one of my favorite rock bands. Warehouse Songs and Stories was a very formative album in my musical tastes when growing up. I'm a big fan of Bob Mould the singer. His first solo album Black Sheets of Rain is good dark, moody music without being hard or aggressive. He later formed a band called Sugar that had 2 really good albums (Copper Blue and Beaster) that are well worth looking up. Good American style post punk stuff ala Dinosaur Jr or Pixies.