Must just be lucky. Over the years my wife has from time to time told me of a movie that she wanted to see. I've always taken her. The movies she's suggested have always been very good, some have been gems.
Many very much enjoyed Band of Brothers, Lord of the Rings, etc. There were those who found those movies to be non-starters. That's understandable. No movie can possibly satisfy the interest and expectations of everyone. A while back my wife and daughters wanted me to go with them to see a movie called Mamma Mia. It was O.K. Enjoyed Meet the Fokkers, Meet the Parents, Madagascar. Very much enjoyed the recent Les Misérables and the two new Hobbit movies. All of these were movies I saw because my wife and daughters wanted us to go. Personally I'll go to see any movie they suggest if for no other reason because I very much enjoy spending time with them doing the things they enjoy doing. The movies, whatever, they don't matter much. But the time I spend with the family, the joy it brings to them... that will be with me forever.