Character? He banged his teammates wife. If that happens on a team other than the Spurs then it probably becomes a major story and distraction. He has a humble personality and an aesthetically pleasing game so people tend to overrate him a little (i.e Barkley/Jalen in this thread, no wonder nobody wants to listen to former players give their bad opinions on sports anymore)
Rondo may not have been better, but that was the peak of peoples perception of Rondo as a player. After he went off in the 2012 Heat series (21-11-7) and the Celts lost in 7 to them despite having Mikhael Pietrus and Keyon Dooling as their 6th and 7th men.