Australian Open is to Djokovic like Wimbledon is to Federer or French Open is to Nadal. Suites Djokovic's playing style.
But he never gets the support from crowd despite being the best player of the tournament, I remember how fans were cheering when he was injured against Taylor Fritz and he was able to overcome the injury and win that match because the crowd was asked to leave around the start of the 3rd set. I don't know why people hate Novak so much because he gives his 100% against any opponent and one thing you can associate with Novak is consistency. I don't remember when last time Novak was out of a tournament early.
The ball comes to the racquet consistently and isnt as fast or windy as hard courts at US Open. He can defend for days and counter attack when necessary. Djokovic's serving seemed to have improved as well, along with his fitness and form, coming into the final stages of the tournament.
I thought he will lose against Milos but he did well to win in 4 sets and by the time final arrived he looked like he never had any injury. I remember when Nadal was asked about it he said if you have an injury you just cannot win but Novak did it.