The Phantom Troupe origin story really moved me... it's crazy to think that if it was a less cruel world they would have been an ordinary theatre troupe. It really explains their messed up idea of morality and retribution. It's like they decided the world doesn't care about them so why should they care for the world. 

But despite all the despicable acts they've committed, they still have boundaries and care deeply for each other. Which just makes it more messed up but oddly compelling... they are such an interesting antagonist group I really love them. 

I think it's cool that currently their conflict isn't with the main characters but with Hisoka instead. The whole plot with the Phantom Troupe, Hisoka and the mafia is so, so intriguing I can’t wait to see where it goes.