I see lots of people saying "the hxh fandom is dead" here on tumblr in posts, comments and reposts on hxh fanfics and headcanons and yeah, it does get less fics than other series that are famous too (c'mon, hxh is huge)
I was wondering why, besides the OBVIOUS "it's in hiatus since forever" which attracts few people and makes some leave, plus an anime that is way shorter than the manga.
my opinion is that hxh characters are way harder to write than some other animes, like one piece and jjba. one piece's characters are quite simple to grasp their personality. while there is, of course, different visions on the characters, most people can think fairly easily about them and what they would and wouldn't do. I feel the same with jjba, with some characters being harder (x reader with kars is more challenging than the other jofoes, shout out to @maestroinheaven)
but hxh characters? those guys are peculiar. I know how the phantom troupe acts with each other and with enemies. I have absolute NO idea how they would act with a lover, nor with a random person coming at them while they're pretending to be civilians. lllumi? I know how this man thinks. and the way that he thinks isn't compatible with love — at least not traditional love. also isn't compatible with platonic anything. Kurapika? he's a protagonist and a well-meaning person that truly cares, so he could have a good relationship that is able to go somewhere. but how? I read @bruevang-blog hxh fanfics and she's amazing at making the guys closer to canon as she can. she also often saying sorry due to the characters being assholes. because most of the characters in hxh are incompatible with normal relationships — a bonus to people that like yandere fics and love some angsty writing — it doesn't help a bigger portion of people that would want some fluff from time to time.
weirdly, Hisoka is fairly easy to get compared to others. probably why he's the one with most fics. definitely the most consistent character I've seen. he would hate this lol. Chrollo is WILD in this aspect. (all of them valid, by the way)