I've mostly just seen Nu!Who, so ...
9 was grief-stricken and felt guilty over the fall of the Time Lords, but learned to trust and believe in himself again again with Rose.
10 was clever, and had no problem flaunting it in front of people. He especially had a passion for humans, and liked to show off a lot. He still felt guilt, but he was moving on and took his place as one of the most powerful and benevolent people in the universe.
11 is a completely bonkers little kid, but he has a vicious and angry side as well.
9 was a depressed warn down soldier
10 was a sad teenager
11 is angry 5 year old (but i still love em)
Haha if he's an angry five year old he's the most brilliant, intimidating, and all around awesome five year old I've ever seen :D His angry side literally made me wince and physically retreat into the couch because I was so... unready for it. You know, happy happy happy fun fun fun RAWR NO ONE HUMAN HAS ANYTHING TO SAY TO ME TODAY!!!!!!!!!!!!!!!