The quickest way to defuse fear or insecurity or anger is usually humor. I think comics figure that out quickly, and, once you figure it out, you think, 'Hey, if I can do this and get paid, that would be kind of cool.'
When my career first began, I didn't have children - so there's a whole lot of difference in the way I choose roles now. Not just films for my children, but how long I'm going to be away, and is Dad going to be home while I'm gone. That sort-of factor plays a part.
There's a saying among prospectors: 'Go out looking for one thing, and that's all you'll ever find.'