Ok, Hunter X Hunter is also another one of my most favorite animes/manga. I've only recently started the anime, and I'm about to watch episode 26 soon. In the manga, I'm only finished through chapter 8, sadly.
From what I've heard, and I don't know if most of you know this yet, Hunter X Hunter's art begins to get really crappy at certain times and the plot isn't too good because the creator was sick at that time.
Anyway, the reason why I like Hunter X Hunter is because it's not more fighting, but more adventure, and each time I watch an episode, it leaves me in awe. True, it's more of a kid's anime, but I still enjoy it. Each individual character is unique in someway. No one is too god-like. Also, like FMA, HXH involves some science and wit in it, although not as much as FMA. Kurapika is a braniac, like Shikamaru from Naruto, except he's more of a history guy.
So far, I'm not even done with the Hunter Exam arc yet, but from what I've seen, I am quite impressed so far. Killua is a bit overpowered (like taking the heart out of Jones immediately), but I like him. Currently, my favorite characters are:
1. Gon. He never really gives up unless he knows he has to. He's quite naive at times, but can be quite intelligent too. I love his personality. His animal-like instincts impress me each time he uses them.
2. Killua. Although he is a bit too overpowered, I like how his personality completely changes when he changes his emotions. He's calm, fast and strong, which are three aspects I like about him.
3. Kurapika. He is so intelligent. He carries a sorta Sasuke-like personality when he thinks about the Phantom Brigade, but otherwise, he's just a smart nerd that knows everything.
4. Leorio (basically all the four friends). He gives the show a more funnier, perverted aspect. That's all I really like him for though.
5. Hanzo. I like ninja I guess. Although he's a bit talkative, he's like a Lee from Naruto: a hard-training ninja. He can also be quite smart at times and also adds a funny aspect to the show. He's quite amazing.
6. Tompa. I don't know why I like this guy. I just guess that the nickname of his really stands out in my mind. He's like some cowardly, information person that makes newbies fall into traps.
I've heard that the creator has become sick once more. I do hope he's ok because I want the manga to continue (although I can catch up at this time).