I gave up on metal, in hope that one day I'll have the time and resources to get the satisfying production value and workflow I'd want when making it.
Metal is by far what I listen most to on a daily basis, but I'm very picky about production.
I love massive soundscapes.
I love groove. I love that "cosmic" vibe some modern metal bands have nowadays, with very echoey spacious lead guitars and gut-churningly-low riffs that sound like galaxies colliding.
I'm also pretty uptight about vocals, in that, if the screams start to sound like those screamo/emo bands, I stop stomaching it.
(I don't mind the most brutal of screams, at all, but there's a very specific register that, to my ears, is devoid of power instead of being the strong guttural roars a metal singer should [IMO] be aiming for).
Anyway, getting a good metal sound can be moderately easy.
Getting a fantastic, distinct metal sound is Damn Hard.
That's because you're working with real instruments (well, guitars,at least) and are aiming for sounds that are very mix-hostile.
Getting a sound to tear you a new one and sound very polished and well produced at the same time takes a sort of skill that's fairly under-appreciated.
That's why I get really excited when I see someone on NG (or in general) doing it particularly well.
Workflow is another issue. You're working with real instruments, so you have to be open to constantly switching between roles and be very comfortable with a segmented production process.
Metal bands get it done because there's multiple members and usually a different person taking care of the studio side.
A solo metal writer/recorder/producer will have a truckload of work to go through to produce a track.
I'd say metal is one of the hardest genres to excel at on your own, because you need both technical ability with a real instrument as well as great production/mixing/mastering skills within a genre that's very hard to get a top notch sound out of .