Baba cared mostly about his wealth and power. He often enjoyed entertaining and would have many people over, usually his best friend, Rahim Khan. This made him the opposite of Amir, which sometimes put a strain on their relationship.
Baba and Amir had a sometimes rocky relationship, as Amir was more reserved than Baba, and preferred reading his mother's literature to playing sports like soccer. Baba said to Rahim Khan, "And you know he never fights back. Never. He just... drops his head and..."
Amir's mother passed away during his birth. Because of this, Amir has always felt that there was a rift between him and his father, like it was his fault that his mother is not there.