Caz, my DS was and still is very placid (compared to some other kids I've seen).

He started chucking tanties around that age too - he's started to learn he had a choice. I reckon they get confused between being able to make a choice and still being in the "mummy" faze.

Strangely enough, when he was about 15 months the tanties were rife. Now he is two, he is just so sweet. There don't appear to be any terrible twos - currently this is my most favourite stage. He's so talkative and loving. We do, on the odd occasion have to put him in the corner, but when we explain why after 1 minute, he gets a complete attitude adjustment. We all hug and it's over.

I think DS went through the terrible twos early, maybe the same will happen with your DS. I hope so, my DS is just beautiful at the moment.