i dont think what plays on the radio or not has to do with the actual heaviness of the music. Sweet Leaf still gets played on the radio and its far heavier then everything we just talked about. And i wouldn't expect a raw, vicious and aggressive album like KiMB to get played on the radio. But i dont think that actually has to do with the heaviness of the music and has more to do with what i used to describe the album. I'd say KIMB is more metal/metallic, but Youthanasia and Countdown are faaaar heavier. And yea Youthanasia is definitely more accessible and softer in attitude and spirit, but again i dont think that has much to do with the actual heaviness of the album. Same with Slayer and God Hates Us All, that album is heavier than a lot of their other work, but tame as fuck in comparison to say Reign in Blood or Hell Awaits. I also think Low and Demonic are heavier than The Legacy and The New Order, but nowhere near as fast, aggressive and in your face as either of those two albums. But yeah i guess we all have our own definition of what heavy is heh. To me its just the fat, crushing weight of the sound ... which is not really a part of most of thrash from the 80's and there's nothing wrong with that and thrash will alwyas be #1 in my book and no other form of music att came close to matching the sheer speed, aggression and intensity of thrash.