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."
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).
It's not like she died suddenly. They had ample time to prepare for her death, and by the time she was gone he was already prepared to move on. He likely went months with the sadness of watching his love leave him slowly, and at the same time he was not satisfying his sexual desires. I can certainly forgive the man for "jumping into the scene" when he no longer had an obligation to his late wife.
"However, as always, every genius has their undesirable part"
This is the same reason that people are obsessed with celebrities' private lives - you're not famous/genius but you can at least tell yourself it's ok because Charlie Sheen does whores/Tiger Woods has two dozen mistresses/Feynman is a misogynist and women just happen to like him anyway, a lot and while naked (note the trend here).
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."