For instance the movies they like to watch, also they are annoyed with the mess of my working table, full with arduinos, eletrônics, computers - the same with my guitars or even the kind of art and decoration I appreciate. Before my daughters, the situation was more simetrical between me and my wife - now I feel more isolated, without my own space at home, furthermore without partner to Discuss books or watch tv shows, my wife is more and more focused in the girls world - during our 10 year dating, we were close friends with lot in common, I would never have predicted this change.
My anecdotal experience as a father of 3 daughters: my relationship definitely got worse and I believe the root cause is the diminished empathy from my wife, on the other hand my sister got 2 boys and our relationship became incredibly close, she became more empathetic to me and my father!