Board Thread:Questions and Answers/@comment-26205387-20150324062737/@comment-26871105-20170712051636

I think it is just that Hisoka is in "love" in the same way that he has a hard in for Gon. The problem is that despite his desire to play with Machi, she is completely unresponsive to his whim and such, which becomes a turn down for him at the same time.

This is probably why Hisoka purposely left Machi alone after his fight with Chrollo, he wants to save her for last when she's really riled up.

As for Hisoka supposedly hates weak people: not really. As said, he really only goes after weak people if he absolutely can not contain his desire for whatever reason. Also, he is shown to have a complete turn down to those both vulnerble and indifferent to his killing intent, such as when he let Chrollo go unscathed at the end of Yorknew arc.