We tried the living-together thing, and it totally worked NOT. We found we both need space and time for ourselves. Being stuck together without the possibility to withdraw or close a door behind oneself gave us a feeling of suffocation.
The fact that neither of us had ever wanted to live together with a former partner could have pinpointed us there, but nooo... We sort of did it because it is expected once you get married, but it does not work out for everyone.
I am not a slave-type, and after my own full-time job and taking care of my kid, I really feel no desire to clean up after yet another person... and neither do I think all the housework is my duty just because I earn a little less... moreover, we have different priorities on how money should be spent, and have totally different tastes regarding the decoration of the home...
So we went back to 2 flats, and each being responsible for his/her own place... and this works well.
The time we spend together, we spend together because we want it, and cherish it.
I am happy with this set-up, the only thing that makes me regret it is that we don´t sleep together every night.
But if I look around me and see all the obese, frustrated, bored, hateful and spiteful couples who do nothing together anymore but sitting bored in front of the TV, I really think we have the better model.