LotM Spoilers (haven't read CoI yet)
Klein's most favorite things in the world are Money and Delicacies.
However, as a god, He has no use for either of them.
He lost His home, He lost the need for the material things that were special to Him as a human.
And still He persevered, for the people that banked on him, from Amanises, to the Moretti siblings, to Ausceptin, to Mr. Azik, to His precious Tarot Club.
Despite losing his favorite things as a human, he kept his humanity by loving the people he cared about, leading him to the point of self-sacrifice.
And I think that is beautiful.