I would feel comfortable with 90% agreement on the fundametals (hair coverings, hechshairim, TV / Movies yes or no) and the remaining 10% (how much time spent learning each day, what flies with the kids, ect) should be a give and take as the couple grows.
We have 20+ years behind us, and still don’t see eye to eye on each and every point. Some areas are my domain, some are hers. But the fundamentals are pretty much in sync