Reading the post and >100 comments I've just realized there are differences between dad and mom mental experience.

Looks like many dads are changing mentally when their first child is born or a bit later. Mine changed somewhere during the second trimester.

Bonding is also almost automatic for mothers (especially who breastfeed), whilst it's delayed or never happens at the same level for fathers. My first child has never been close to father because he worked "9-9-6" and got 2 day leave. He could never really calm down crying baby or put her to bed. With the second child, thanks to large corp policy, he got 15 weeks bonding leave and it was a very different experience for father and child - baby didn't care on whose lap to fall asleep.