Well, at the age of 33, married with 1.5 kids, living in NY suburbia in a 5 bedroom house and a Lexus RX300 parked in my driveway, there's certainly a difference between me wearing my Slayer shirt to the supermarket on a Sunday afternoon and going to see Slayer play live somewhere in NYC. The former of course doesn't even get a look in - anymore.
I absolutely love going out with friends to shows or festivals, and since there are so few metal fans in the world, even at my age, I feel fucking awesome walking up to the gig venue, especially as you feel the tremble as all the other hundreds (used to be thousands) of fans all gathering at the same place. Everyone in their shirts, everyone there to see the same band, everyone in it together. Just like tailgating - something done much more so in the US than anywhere else. Tailgating at Iron Maiden last year was just outstanding, and missing Wacken (with backstage passes) is something that I will always live to regret (even though it wasn't my fault for not going). Wacken is like the fucking Mecca of metal.
No, I don't sit there thinking I'm part of a gang or these are my "brothers in metal", but yeah, I love being around people with common interests (OUTSIDE OF THE FUCKING PC & INTERNET!!!). That is why live shows will always be the best thing about metal.
Even when I went to see Agalloch on my own in Boston, it was just friggin' great. I wore that one of a kind shirt, got to meet Andreas from The End Records, he hooked me up backstage with Agalloch, and Joseph from Vendlus Records handed me all those CDs that I sent out to you lot. There was no need for formal introductions, it was already a given that everyone was friends.
It's just like going to see the FA Cup final, or England play at international level. There is something unique about the old school metal fans out on the street. It's 1000 miles away from stupid mallrats hanging out at the mall listening to Lamb of God or Marilyn Manson outside Hot Topic.
There is no fucking way I am going to see Slayer, for example, in a polo shirt and slacks. Likewise, if I go see England play, I'm wearing my England jersey. Fuck, I wear my England shirt when I watch them play on TV.