I've definitely moved past the metal "stage" of my life. It seems like everyone else I know has as well, even the guy in high school who was literally the self-proclaimed "Metal Guru" of our school. He's now shaved his head, started listening to techno, started dressing in button-down collared shirts, joined a fraternity, gotten kicked out of it, and is a declared accounting major at his University.
Metal as I see it applies to certain types of people:
-Sociopaths
-People who feel inadequate and feel that by adding superficially "intimidating" aspects of their personality, they can coerce others into respecting them, despite their deficit of self-esteem and lack of charisma
-People who feel like they are misunderstood, isolated, and generally antagonized, victimized, or exploited unjustly by others
-Angry or passionate people (pretty much applies to everyone who likes metal)
Though I still consider myself a metal head, I'm branching out a lot more. I don't listen to it as much as I used to, but I still enjoy a good metal song every now and again. I just hate the asinine "metal or die" mentality that many metal fans harbor. Though the self-imposed xenophobia that metal heads enforce is basically one of the things that has allowed metal to survive for so long (since metal is considered an "underground" genre), it's the worst part of the culture. That being said, I don't think metal really mixes well with many other genres. Metal, in my opinion, should be able to be summed up in one compound word: "badass."
Sidenote: if you think Bullet for my Valentine, Avenged Sevenfold, Sonic Syndicate, The Black Dhalia Murder, or any of those other shitty emo hybrid knockoff bands are metal, you are not a metal head. You are not a badass. You are a dull, gullible, self-pitying kid who pretends to be a member of the big boy's club because you think you understand what makes metal art. In truth, you are the pawn of corporate idea harvesting; you are the victim of the music industry's attempts to bastardize metal into a marketable, more docile form. You are like the label heads that take what they think they know about metal and twist it into something sure to sell. This is not a question of "differing tastes and opinions." This is a matter of you supporting the death of a truly genuine genre of music, the only one of its kind, for the sake of bands that are today's equivalent of late 90's "boy bands", and I'm not kidding at all.