Agreed. Try to hit the broadest market possible. Or have the guitar classics everybody wants to learn sprinkled with a few lesser known bands that would really give someone a woody like Blind Guardian, Modest Mouse, Buckethead, Clutch, etc. Also, if I had never played guitar, and even if I had, some of the faster metal might scare the shit out of me and I would think I could never do that. Just a thought.
"Dropbox added a war criminal to their board of directors who also directed the NSA to illegally spy on us..." Just my own curiosity, who is the war criminal on their board?