The deepest desire we have is for a person (divine or human) to know everything there is to know about us and to love us anyway. A person who knows we want to be good but that we are real stinkers from time to time; someone who doesn’t want to change us on order to love us (even for our own good) but just plain loves us.
All of us want to change at least something about ourselves physically, mentally, or spiritually. And perhaps we even want that person to make it possible (or at least give the support needed) to make that happen. But we don’t want it to be a condition of the love they have for us.
That being said, if there was one piece of advice that I would love couple coming to me for marriage often ignore (right after “go to Mass and pray together”) is to marry the person that they come to marriage prep with. Marry that man or that woman, not the one you hope they will become or that you hope to change them into. Don’t marry a hope – marry a person.