All three were former escorts who latched onto me and left the business.
I didn't really "want" them per se. They just sort of picked me.
I enjoyed their company, but I felt sorry for them and began to take care of them (years apart, not at the same time).
The first one was American (Latina) and wanted to get married, I suppose, to impress her family who were immigrants. She made it clear in no uncertain terms that she was with me because I was a fit/trim 40 y/o Caucasian with a 6 figure income.
The second and third were both Korean and absolutely wanted Green Cards.
What would I want if I did get married?
A loyal, faithful, dutiful, deferential, young beautiful wife for cooking, cleaning and sex, and to take out to restaurants, weekend getaways and nice vacations. The traditional marriage as was known in the US prior to the 1960s. That is what I would want.