My Dad and I did not get along at all growing up. They GAVE my sister anything she wanted and I had to work like a dog for anything I wanted/needed. Come to find out that was later in life called a work ethic. My sister turned into a POS and my Dad and I are best friends. I can never thank him enough for teaching me the value of hard work and that if you give a man your word then you damn well better keep it.
