I think that disagreements are part of marriage. I think the people with the healthy marraiges have figured out how to handle these.
My W and I used to argue all the time about anything I look back now and say how sad we were. I think the trick to conflict and disagreement is allowing your S to have there own point of view. Making it ok for them to tell you what there point of view is. Validating there feelings even if you disagree. Then trying to work out something that you both can live with. Another big thing is letting the stuff not affect how you feel about your S.
Anyway just my 2 cents.
Lee