This review DO NOT contain spoilers.

First of all, i need to say: hunter x hunter is not a flawless mangá. The art style in some chapters are avarege, since the author has many health issues and can´t draw properly, and some moments has too many exposition dialogues that doens´t need to be too long.
However, despite these problems, hunter x hunter is one of the most unique and inteligent battle shounen that exist, followed by one piece and jojo.
Here are some of the most compelling things that make me love this mangá:

The narrative structure: Hunter x hunter has 4 main characters, and we follow the journey of each one of them to search their own individual goals. However, they never are the center of attention: the villains and many other characters has their own lives and doens´t care about the main characters goals. In a normal battle shounen, the villains are always in the main character way and the whole arc will be focused in the fight between the main cast and the villains. In hunter x hunter, however, the main cast has zero relevance in the villains plans, and are is more focused in each character goal than on the fight itself.

The transition of arc: There are many shounens (cof,cof, fairy tail cof, cof) in which the arcs are repetitive and predictable. In hunter x hunter, however, each arc is completly different from each other, both in narrative and style. Think in hunter x Hunter as many different anime troopes in one anime: Do you have a máfia investigation arc, a card game isekai arc, a psychological horror arc, a political arc, a battle royale arc, etc.

The magic system: Holy shit, what an amazing and creative magic system. Hunter x hunter always has some creative battles and use of powers that lacks to many battle shounens.

I hope you find this review useful.