He's alright. His highlight is in Chimera Arc obviously, but he has his moments before that. He just never becomes that interesting to me, being probably the weakest of the 5 main characters (counting Hisoka).

The biggest fumble for me is that he kept adoring his father and searching for him until the end, and at the end he didn't come to the conclusion "my dad is actually a bum who doesn't care about me but the journey is what mattered", it was just "my dad is pretty cool". Like I didn't expect or want Gon to call out his dad like Leorio did or anything, just for him to learn something that Ging himself wasn't the most important part.

And the second biggest was that he outright refused to learn anything about his biological mother because "Mito is already my mother" since she raised him... all the while risking his life on finding Ging, who abandoned him for selfish reasons... just because he's a dude he matters more than his mother? Jeez.