I heard a great “litmus test” for a good wife.
Watch her relationship with her father. If she is respectful towards her father, even (or especially) outside his presence, go to that father immediately and plead your worthiness to court his daughter.
I heard another example the other day -
a man, with no intentions on the young lady, noticed her carriage, her modest dress and hair style, and approached her - “young lady, can you promise me something?”
She responded that she couldn’t promise anything without her father’s permission.
He said, “well, ask your father if you can promise to always dress, walk, and act just the way you do now.”
Boy is that spot on!
The only thing to add is look at her mom, that is who she will be most like.
My father gave me that advice 30 years ago. It applies to both her looks and her suitability as a wife. The "apple doesn't fall far from the tree" adage applies here.
I did it when I chose my lovely bride 22 years ago. Her mother, then about age 60, adored her husband, was trim and modest about eating, drinking, and money, and was happy and energetic. Now the Mrs and I are both over 50, and she is just like her mother.
The respect is key (and Biblical). Many women turn on the charm (and sexuality) before and for a few years after the marriage. But if they can't appreciate the fellow for who he is, and let love adapt, she turns off in the sack and increasingly disrespects him.