I don't know how to articulate Gangstarr's role in my hip hop fandom/education other than that while I'd sean/heard/done (quite poorly) hip hop before I'd ever heard their music I didn't see/hear or try and do it the same after. And this is the video* that did it :
*It's funny because radio wasn't AT ALL crucial to my musical adolescence. It was all videos and concerts. That's how I heard music.