I love heavy doom and speed metal.
Probably Motorhead, but there are a lot of contenders. It's not usually comfy, more keyed up on speed, but they have some really comfy standouts.
I have a lot of runner ups though. Especially experimental trippy stuff like Black Magick SS or Cirith Ungol.
Another Perfect Day, the whole album. The title track is incredibly comfy though.
>Ever been to a concert?
I've seen Testament/Overkill together, Wintersun once, and Stormwarrior at the same bar which held periodic metal shows. Stormwarrior was especially cool.