I agree; those short stories changed my life.
Kaim is such an incredible character in them.
Like that one story where he realizes the people in some mountain village are poisoning themselves with this ice candy stuff they eat for energy. And he has to decide whether or not to tell them. In the end he realizes the strange sort of happiness they have isn't something he has the right to take away.
It's just so cool, that holistic 'leave things be' way of thinking that an immortal person would have. Not apathetic, not neutral, not even passive. It felt complex. The thematic is strong in most of the shorts, like when he pushes a woman towards romance with his friend instead of himself.