I have 2 cal kings. One, who is the larger one, is nice most of the time, but does bite from time to time. My other one, who is still a little guy, bites like crazy (but they are all bluffs, he doesn't even lay a tooth on me, just hits my hand with his mouth) and musks all over me when I pick him up. But as he gets older and bigger he is starting to tame down just a little bit.
It's always good to have an agressive snake in a collection, keeps you on your toes!
In my experience, they are active snakes. At night, while in my bed, I hear them roaming around their cages...tipping cage furnitutre over, burrowing in their aspen...they do it during the day too. Handleable? Yeah, they are, once they are used to you. They are good snakes to have, I love them.