Metallica. Not that I feel I should like them. They just piss off. And they''re boring. Only album I own is St Anger. Saying its the best one pisses everyone haha, i do actually mean it though. songs are just too long.
Quite nice to be justified that their output in general is throwaway!
The most recent half of their output might be mostly trash, but I opine that Kreator created some of the finest thrash songs ever. The only American band that came close for me was Sadus, and that was only with their first demo and album.
I've no desire to see Carcass live. There first three albums are (to me) great death/grind albums, but the second two are amongst the worst "metal" albums ever made. Seeing them play tripe like No Love Left next to Symphonies of Sickness would just ruin it for me.