He is very arrogant. He was telling Rafter during their time together in Davis Cup that he was going to come out and beat this guy and that guy 6-1 6-2 6-2. This amongst others was the reason he was kicked off.
He has come out this year and "suddenly" he's a bit more humble. Called Ken Rosewall, Mr.Rosewall during his speech after winning Sydney but then again has also made some other stupid comments like Federer has to make it to 3rd round.
I think he's making an effort to be a bit more humble so the public/press get off his back but to me it's fake. At the end of the day, deep down he is arrogant brat and it's such a shame because he is talented and we need an Aussie to lead the next generation but this guy drinks too much of his own bath water for me to get excited about him winning tennis matches.
"Nadal is a good example of an counter puncher" - RF-18
"Cilic has huge serve too, so that gave Karlovic extra confidence" - jg153040