There's a lot of really great hip-hop from the late 80's. I'd go as far to say rap is the best thing the 80's gave us.....Besides your's truly, of course! Just like everything else, when something becomes popular, leave it to suburban, middle class white kid to ruin it for the rest of us.
If you were paying attention, you would have also notice another trend that started in the late-80's; one we can fully blame on suburban white kids. The girl in the very 80's over-sized white sweatshirt was gothing it up for us.