I just thought about this, this is not based on the zanpakuto arc. Their personalities are probably also not the same. This is how I like to think the true zanpakuto act. If I'm not mistaken they are being manipulated in the zanpakuto arc. Anyway, I love Hisagi and I love Kazeshini, so enjoy. I don't own.
Kazeshini was a sadistic bastard and he knew it.
It was the reason he chose Hisagi as his wielder. Not, surprisingly, because he wanted to torment the boy or because he wanted to rip the boy's soul apart, no, but because the boy was not.
The boy respected him. They had their arguments. Of course, every zanpakuto argued with their wielder – if he had to listen to that azure fairy one more time he was going to rip him to pieces and feed him to his wielder – it was what made the bond grow. Arguments, for all the pain they caused, were passionate. There was no argument that could not be passionate.
And that is what made his wielder someone he valued. Because Hisagi could fight him for what he believed him. Hisagi didn't fall to his desires, didn't submit and say fine.
He fought back.
And that alone was what made him a worthy wielder.