My friend, who is a psychologist, said that what makes relationships work, is not similiar interests or hobbies or tastes or anything like that, but a similar level of neuroticism. In short, that means that people with a similar level of craziness are good together.
She found that really revealing, after being with a guy, she shared no hobbies or interests with. She had never thought, that she would end up with someone like him. He is in computer science, likes drinking beer and techno music. She liked books (by female writers or Rilke), theatre, museums, art (photography) and white wine. She had always thought, she needed a guy who was similar and shared her passions and interests. Me too, I admit.