I don't know if "no-one in the lead" truly exists.
one person or the other will always have more drive, interest, a better practical/ logical or emotional point even talent etc in any decision making. or they might just be louder
it's a power/control game and if it ends with a win-win that's brilliant.
but typical one person might need more convincing so in my eyes the other one is the true decision maker in that situation.
we can be both happy with the decision we both made, freely, but one of us must have wanted it more.
does that even make sense?
btw DH doesn't rule over me. we make decisions together that we both happy with or typically one of us wants and the other doesn't mind so much because the result doesn't bring unhappiness.
But if he, as head of our household, ever had to make a decision without my agreement he would not take that lightly. He would never excercise power over me just to show is the king of the castle.
that would be wrong. he would consider absolutely everything and I could trust him that doing anything against my will would be very difficult decision and a heavy burden to him. because he loves me and would never deliberately cause me upset or pain.
And it would have to be a very big thing too.
But we generally think the same about big things, if not initially then eventually, and make decisions together.
does this answer your question? if not, please ask again. sorry if I'm just rambling on. (I am very distracted by children)