Great point.
For me, there are few things that get my blood pumping like a really great riff. I absolutely listen to metal as a musician. I want to be impressed by the musicianship.
I also feel a bit ruined by metal... I sometimes find it hard to listen to anything else because, unless it's creating an atmosphere or is funny or something, I get bored. A lot of music is stupid, metal included, but at least metal typically holds my interest. I don't know how to say it any better. I'm pretty fucking exhausted what with a new baby and all, so forgive me if I'm not making sense!