I think Palm and every lady larping at Gon are more of pedophiles than Hisoka. I mean, the guy looked at kids' ass and got turned on, but arguably, he gets turned on by every person that have high fighting capacities. He got turned on at the brink of death against Chrollo because he thought his skills were fantastic. It's a very fictional thing so I'm not paying much attention to it personally. I mean, people in real life never have erections because of a fight, this just doesn't exist.
The reason why I'm not a fan is because he's "eccentric and not original". I prefer Terrorsandwich by far, who might be a cliché serial-killer like Hisoka but he is more 3-dimensional to me. Can't wait to see them interact though.