Personally, my productivity went up after me and my wife separated. No kids involved. It was a focus issue with me. I simply could not manage to fully focus on what I was doing when having to deal with another person's constant issues, whether it be this or that. Constantly having to pay attention to someone, having to go along with weekend activities I was not in the least interested in. Now, I love the woman, and we are still husband and wife, but I personally can't handle living with someone and therefore having my life intertwined with another person's life.