Story:
The main goal is very solid and easy to understand. It is the journey towards that goal that counts the most. Gon and his friend Killua travel across the world to find Gon's father, but along the way they find new friends, enemies, troubles and above all: An new adventure!
Also this show has the most interesting and varying arcs I've ever seen. From one arc to the other you end up in a crime-thriller arc or a video game arc or a epic war between two different species. The arcs never seem the same of boring and still it is part of the same main goal that the series is all about.
Art:
For those that are familiar with the art of the HxH manga know that the art in there sometimes sucks. It is sometimes even comparable with a concept sketch. But as bad as the art sometimes is, so beautiful is the art and animation in the anime. Never seems the art to disappiont.
Character:
The amount of characters in HxH are big but this is in my opinion a good thing. The characters have creative powers, unique designs and really fleshed out. Every character could be the center point of a new arc and it would be awesome to see. Even if it would be minor characters that usually don't get any spotlight. That's when you know you have great characters. Still wished more cool characters got the spotlight they deserved.
Overall the story is as close to perfect as perfect can be and achieves more in 148 episodes then most shonen are able to get after 400+ episodes. Also, the music/OST is phenomenal. The opening is super motivating and catchy. It is also one of the few japanese songs I can sing completely. The endings are really beautiful and bring you feels after an episode has ended. The OST is just as amazing and I would really recommend to buy it if you can. It is just that great!
The manga hasn't ended yet (and won't end any time soon because of hiatus) but the point where the anime ended couldn't be a more perfect moment to end the series on. I think that if this all we will when it comes to the anime, then I can live with that.
