Oh hey a question I can answer without difficulty, let's go.
So I watched anime as a teenager a good bit but I pretty much dead stopped in like 2017 or so in the middle of Boku No Hero and didn't watch any anime for ages after that...my wife isn't into much anime and I would only watch the occasional, until one fateful day sometime last year right after Netflix introduced the random watch button.
Plopped on the couch on a day to myself, figuring what's the worst that could happen at handing the chaos gods the fate of my afternoon, little realizing it would alter my life.
Sure enough after pressing that button, Hunter X Hunter came on and I thought why the hell not. After the first 3 episodes I was done, you could not drag me away from it. When it was finished I wanted more, so I watched the 1999 Anime (Which is better in everyday but being shorter IMO), after that I still needed more. As someone who had never read manga outside of the occasional short horror that plopped in front of me, I figured it was worth a shot, so I started reading. I was done with the Hunter X Hunter manga in a week, left feeling unsatisfied and yearning for more, only to learn that it was in limbo, with narry a word in 2 years of hiatus. Hunter X Hunter made me feel things I hadn't felt since I was a child. Viewing eyes upon an unlimited world, one where humans rank only by their strength of will and no other criteria, a world of mystery unbound and endless possibility open to all who have the will to throw open the gates.
The 1999 in particular was amazing with its anesthetics from sweeping green fields, to sweeping metropolises, with powerful organizations, and FUCKING HUMAN BRAIN COMPUTERS. It had been one of the biggest things on my mind every single day for almost a year now and I cannot shake the tingly in my head over the thought of a mere 10 more chapters. After Hunter x Hunter I vowed to never start reading or watching a manga or anime that couldn't keep me satisfied. So naturally I started reading One Piece.
I tried watching it, I really did. I spent maybe an entire week binging it but my wife wouldn't watch it with me and I didn't have the solo time to even get past half a days reading of the Manga, so I just stuck to reading it. It's clever, smart, fun, but most importantly damn near endless. Over a 1000 chapters that took me nearly 3 months to catch up to with consistent chapters every week through one of the tensest and anticipated finales ti an arch in Manga history, and I lucked into the climax starting reading as it released around chapter 1020, boy I felt lucky. Nothing worse than a 4 week hiatus while getting the biggest reveal in the series not 6 months after starting reading? Not to mention Hunter X Hunter ending an almost 3 month hiatus right when One Piece starts failing to hold me over? My manga luck is shining.
Also caught up to finishing Boku no Hero Academy since I don't have patience for Anime anymore, and also reading Kuno won't let me be invisible which is absolutely adorable.
But to go back to the question asked, it's Hunter X Hunter, because I can hardly thing of any media that engrossed me so much as to make me feel that my entire purpose in this life was to be in the golden age of Hunter X Hunter and experience it in its prime. It feels like my souls long yearning is coming due and I am eternally grateful.
TL;DR Hunter x Hunter in its entirety was a spiritual experience dictated by elder gods.
Allow me to attach some of my favorite stills from the Manga.