When I was in my teens and early twenties, dating was much simpler. If you were attracted to someone and they to you, then the two you dated. And, if you both loved Nine Inch Nails, then, you had a point of commonality. At least it was a focal point for building a relationship.
When you were young, not only were you discovering things about your spouse, you were also discovering things about who you are. So, you learned about each other together.
But, when you get into your sixties, you have already learned a lot about who you are and what you need in a relationship. And while attraction and commonality are still good, life has taught you that a relationship needs much more than an interest in Nine Inch Nails.