There are editors who edit the same way no matter what.
Valuable editors are the ones who really respond differently each time.
You want an editor to balance your strengths. A producer who may not have a strong sense of structure may want to hire an editor who does. The ability to watch the same footage a hundred times and still be able to cut as if you're seeing the footage for the first time with fresh eyes. When things get overwhelming you are able to stay focused and keep your head about you. You also have to have good social skills to put up with your director and producer.