When I saw him in Terminator Genesis I screamed as well ;)
Nine is OK, but he didn't really get enough screen time to really tell, so I'm kind of in the fence about him.
I started watching the new season (Capaldi) and I started to think he was okay until he did the worst thing imaginable... (Kind of spoilers)
He got rid of the sonic screwdriver!!!!
For sonic sunglasses!!!!!!!
That made me so mad, especially when I had kind of accepted him!
They might bring it back later, but if not I'll be really upset.
Anyway, 11 is the best ;)