I believe that Sepultura were a DM band that evolved in to a thrash band. Their origin and cultural background were things that made them a bit special in my mind. They were pretty unique compared to a lot of their contemporaries of the time, which is what I liked about them the most. I probably listened to Chaos AD a couple of hundred times. It is just so good.
Even though I don't listen to them much now, I think that they are one of the greatest metal bands ever. When I read the metal mags now, I look back on that period of late 1980s and the 1990s with nostalgia-I'm not really into all this Bring Me The Horizon stuff and the fashionable young people covered in tattoos and fancy haircuts screaming their heads off.