Heh, didn't read all the posts. I apologize for being redundant, let's just say you make a good point.
But still I don't think Megadeth is metal. Can't say I have sat and listened to all their albums all the way through but what I have heard doesn't strike me as metal. Plus I had to play that goddamned Symphony of Destruction song on Rock Band (or Guitar hero, they all kinda mesh together after a while) so many times I am sick of them just for that. Ok, I just can't stand Mustaine's voice.
As for Mortiis the band (or man) I like his darkwave albums. His goth/rock/techno doesn't really grab me, I'll just listen to NIN if I want to hear that kind of stuff.
Which reminds me of profound metal lyrics. NIN - Broken, the song "Wish." He won a grammy for it so it must be profound.