You're right, his children had de facto differences, and that's OK. What annoyed me was his exasperated tone when he mentioned that his daughter liked having the same story read.

As for womanizing, again it shocked that after so little time passed after her wife's death, he jumps into the scene (and with a vengeance).

But maybe, I'm reading too much into this. Here's what Michelle Feynman (daughter) has to say about what kinf of father Feynman was (http://www.basicfeynman.com/qa.html):

"Fantastic. Fun, supportive, sweet, silly. He went to great lengths to entertain us. When I was young, the nightly ritual included him scouring the house for the correct stuffed animal, with me rejecting each and every offering until I had the desired one, or until he had made me laugh with his efforts. I'm not sure which was more important. He also made for an excellent radio. I would sit on his lap and turn his nose, and he would make up songs from different radio stations."