One of my favorite briefings included:

"If it comes time to make a decision, both of us will be involved. If we disagree, we'll go with the more conservative option. If it's not clear which is more conservative/safe, then we go with my idea."

I just like how it set the tone for a crew environment, but laid out the rules in the event of a disagreement at the same time, and not in a "it's my ship" kind of tone.

That same captain involved me in nearly everything, I did the "welcome aboard" PAs on my legs, etc. It was a very positive, enjoyable environment.