A lot of what we talk about here are things like not nagging, not demanding he do chores your way, and overall trying to have a pleasing personality, which is why I thought this article on changing your personality was interesting. A couple of excerpts:

As someone becomes more invested in a job, they often become more conscientious; likewise, when someone becomes more invested in a long-term relationship, they tend to become more emotionally stable and have higher self-esteem. In fact, the more the commitment is part of a person’s identity in any context, the more it appears to cause personality change.

Over the course of the semester, the student’s goals to change their extraversion, agreeableness, and emotional stability appeared to inspire actual growth in the desired direction. For example, people who said they wanted to be emotionally stable “more than they currently are” actually increased their emotional stability each month. What’s more, people who came up with concrete plans for reaching their goals showed much greater changes in extraversion, conscientiousness, and emotional stability than those in the control group.

In the article, it does say that:

However, the intervention did not boost growth in agreeableness beyond merely wanting to be more agreeable.

But I disagree that a person cannot willingly and purposefully change to become more agreeable; I think that it takes longer than one semester (the length of the experiment) to change this aspect of your personality. We have always said that it takes an average of six months to a year to internalize a positive attitude.