Blue Swedish and Khaki Campbell ducks?

I just got a blue swedish and a Khaki Campbell duck.
I know how to take care of them but I was wondering what they are like.
Does anyone know how they are in personality in such.
Are they mean or nice, do they lay eggs alot, and how do you tell if they are boys or girls?
Answers:
I think in any duck species, you can tell by their tail feathers. If their tail feathers curl up, it's a boy. If not, it's a girl.
Do you have pictures of your ducks? I've never heard or seen either breeds before.