There's good stuff scattered throughout the Slayer catalogue. Starting in 1994 or so, they started trying to break into the mainstream, mainly because below them, the underground death metal had taken over the "most extreme" category that was Slayer from 1983-1989 at least.
Despite it not being the fourth, but the fifth, international Day of Slayer, I think the holiday went off well and we should do it again next year.