The most important thing for me is that he is a mentch. First, last and middle criteria. (Obviously, compatibility, similar hashkafos, etc, but the ultimate defining factor is that he has to be a mentch.)
My parents both have yichus, choshuv families, my father is a rabbi, they were both the “top catches” with all the qualities so many people stress on… None of that means a thing if a person isn’t a mentch.