I have this acquaintance who recently got divorced; let's call her "S." S and her husband were together for five years, and have a three-year-old daughter. They had their various problems, of course, as any marriage does, but one thing that always stood out to me about their situation was just how little S's husband seemed to participate in - or want to participate in - their life.
S made the plans. She made the friends. She picked the rugs, booked the vacations, shaped their days and months and future. Something else that always stood out to me: It didn't seem like S's husband particularly liked the things she planned for them; even as little as I knew him, her choices just seemed so clearly the opposite of what he would have chosen himself. Beer instead of champagne, et cetera.
It's not something I'm not sure she ever noticed herself; it was one of those parts of a marriage that you can only see when you're standing outside it.