Something else I learned from Agatha Christie is that merely sharing similar literary taste and general good sense with a person does make them a good choice for marriage. When people in your village start collapsing with alarming rapidity, when the servants start slipping on ladders more frequently than their previous clumsiness level suggests reasonable, and when your extended family has alarming rash of car accidents, you want to be in a relationship with someone who accepts the implications.
A dull person may well just wave aside your concerns with the very sensible suggestions that you’re blowing things out of proportion.
Obviously, your chances of survival are much better if you’re working with someone who’s willing consider the clues and jump into tracking down the murderer with you.
In other words, marriage is aided by a sense of shared adventure.
This particular advice has borne out in many other stories and genres as well. If you are attacked by any type of undead creature, or transported in time or between dimensions, or start developing a superpower, you’re much better off being able to trust the person you love with this startling information.
Of course, I have the best of both worlds, as Colton and I share at least an overlapping (if not quite identical) taste in literature and movies *and* a sense of adventure. I’m pretty sure being married to Colton astronomically raises my odds of survival in case a catastrophe of any genre suddenly breaks out around us.