From the title I at first thought you were talking about metaphysical vs natural processes with emotions. Sounds more like your asking people about relationships. I mean first off I had a type and my long time wife was not my type. Relationship wise I just sorta went with it but I felt at the one year point should decide if its going anywhere or not. For myself I have to feel loved and I have to see a future. I know I dated a girl at one time where I felt like I just met her certain bars or bullet points and basically any guy would do who had the minimums and was willing to be in a relationship with her. Add to that I thought about trying to teach and she laughed that off as a silly thing to do (would likely be less money). My wife as I said is sorta not the type I thought of being attracted to. In many ways we are opposited but I like to think of it as we offset each others weaknesses. We have some very important similarities though in moral type of ways. When it comes down to it I hit the time points and it felt right. I think the same with her.