I disagree with you there. Take a look at this clip and his thoughts on Andy murray as the favourite for the AO:
http://www.youtube.com/watch?v=miYqp0jQy1U
Fed openly talks about how great it is to be creating history every game etc etc.
I'm not saying that tennis players need to be great humanitarians . Fed is an exceptional player, possibly the most talented player to have walked the planet. But for some fans such as myself, we judge a player not just based on their results/game but also based on his attitude. Simply no comparison between Fed and Nadal in that dept.
Nadal is humble enough to give a lot of credit to other players. Pistol Pete gave just about the right amount of credit. Fed doesn't always give his opponents enough credit.
I understand why Fed has the attitude that he does. 90% of human beings would have that attitude if they were in Feds position. 4 yrs of complete dominance, the whole world singing your praises, people calling you the GOAT - its super hard to not have an ego after that! Which is why I have so much admiration for those 10% of people who CAN fight the urge to be arrogant. Nadal is one of them.