Well that gave me a good chuckle, especially the bit about the "new" editions of D&D in light of our past interactions on the relative merits of 4th Edition - if that actually happened I think I would laugh for days on end, heh. The natural synergy between Metal and gamers of the table-top variety though is one of those funny aspects of a genre that the average non-listener doesn't pick up on: Metal is, in the large, exceptionally nerdy. Power Metal in particular is more often than not exactly what your average sweeping fantasy campaign would sound like if you asked a bunch of dudes with long hair and loud instruments to sing about it, and any given Metal song is very likely to be based on or inspired by our collective nerdy "sacred cows".
*Scarpers off to go back to listening to his new Progressive Metal/Space Rock concept album about science fiction films and franchises like The Matrix, Firefly, Planet of the Apes, Children of Men, A Clockwork Orange, The 12 Monkeys, and Escape from New York*