The Ninth Doctor was an emotional incarnation of sorrow and anger. Emotionally exhausted, he would break down when faced with pain, suffering or death. He his is sorrow with a façade of manic energy, sharp, offbeat wit and enthusiastic confidence, but would quickly drop the masquerade when deeply displeased. He often made decisions in heat of the moment. He also had a strong sense of right and wrong, and didn't believe someone following orders was an excuse to do horrible things. He also displayed a certain level of childish joy when it came to toying with people emotionally, such as addressing them by the wrong name or insulting their intelligence.
"Before I go. I just want to tell you, you were fantastic. Absolutely fantastic. And you know what? So was I." -The Doctor
Congrats to AddHam on the FTF!!!!!!!!!!!!