It's quite clear that the musicians are interested in the complexities of the song they write, yet I suspect the fans like them for completely different reasons. For example, at a live show, the fans are greasy guys throwing up their hands saying, "Hardcore duuuude!" rather than stroking their chin and thinking, "Hmm yes. Interesting choice of time signature and use of polyrhythms, hmmm yes indeed." The disparity between the musicians and fans is really funny if you think about it.
Honestly, they probably are thinking about the complexities in it. And that's probably what draws them more towards it. I find that there's more musicians at metal shows than any other genre. Go to a rock/pop show, and it's full of people who like simple minded "radio friendly" music that they can easily follow, and don't know anything about what's being played. Jazz probably has more music fans than metal... But I'd say (imo) that those two top it. I once jammed with a drummer doing some old metal covers who said "If I don't nail it, most of the fans won't know anyways". We laughed and said "Dude, this is metal. Over half of the audience probably plays instruments. I like to think of most of the complicated metal that I listen to as "Music for musicians".
One of the more ironic details of my life was that I played in a death metal band. Even more ironic was that between that, and the jam band I was in, I played some of the largest venues and biggest openers of my career. Two genres that I have zero interest in brought me some of the biggest gigs I've ever had. Just thinking about it makes me feel weird.
It was funny when I played my first gig for a death metal band. People really liked us but had some... hmm... complications with headbanging because of tempo and signature changes
At every metal show there are always a bunch of players and they will watch intensely waiting for one wrong note and then bam, "these guys suck!". The most intense and hardcore fans, also the most critical.
This sounds suspiciously like another TB'er running his mouth about a genre that he doesn't listen to, cannot play, has never seen, knows nothing about, etc. i.e., please put a sock in it.
As someone pointed out above, with the exception of jazz, metal fans are some of the most knowledgeable about music that I encounter. On some level, I think you are right about the irony thing. Many metal fans also enjoy the music sort of tongue in cheek. This isn't to say that they don't take the music seriously but most metal fans kind of laugh at the imagery. Also, metal is obviously a very visceral genre so in the moment of the show is the moment when you go crazy. Listening at home is when you pick everything apart.
I would say that one of the more ironic aspects of death metal is that a lot of the singers are lit nerds. The lyrics to many songs are very sesquipedalian. You practically need to have a thesaurus on-hand to understand some of the songs. Yet, outside observers say "these guys are a bunch of low-brow, knuckle-dragging 'tards". As an aside, a couple of guys going by "Jens and Rikard" made these absurd videos a few years back of Cannibal Corpse songs played in major keys. It was amusing to hear.
I thought that was Andy Rehfelt (sic). His videos are hilarious. Also, Weberman, did you know where you're from is goblin spelled backwards? They're eating you, and then they're gonna eat me. OH MY GOOOOOOOOD
ironic is Christian death metal...i am in drop c at the moment and loving every minute of it..every time i go drop tune..i get new songs...i write our music on guitar and then add bass...my bass lines lately are heavy but i am bouncing em and gettin a cool push and pull vibe goin...only no cookie monster vocals for me