What was the biggest change you noticed in your partner after he became father.

The biggest change i have noticed is how much he have sacrificed to work for the family. He used to meet his friends for a drink almost every week. He will always come home around 4am and goes to work again at 8am. Ever since no.2 is delivered. he changed, (yes he didn't change immediately aft no,1) He only started to settle down and changed once no.2 was born. Now he focuses TOO much on work till he hardly ever had time for family. He always puts work on his top priorities and often neglected his family. I guess he still needs time to balance out things in his life.