What do you think is my favorite book? Fishing? That's just my cup of tea. He seems to have a liking for my children. And I have to tell you, I'm passionate about numbers. I was quite captivated by his appearance. He likes pop; he doesn't care for classical music. It is not really my thing. One does not typically have a "penchant" for a person. You have a penchant for doing something or for an activity. He could have a penchant, for example, for talking with your children. He could have a penchant for "being" with your children, since "being" is an activity. "Prepossessed" is not wrong, but do you want to use such a strong word? It means captivated to such an extent that it excludes other thoughts or feelings.

What do you think is my favorite book? Fishing? That's just my cup of tea. He seems to have a penchant for my children. And I have to tell you, I'm passionate about numbers. I was quite prepossessed by his appearance. He likes pop; he doesn't care for classical music. It is not my thing.