If we look at couples, no mater if real life or fiction, you always will find differenes tht don't fit.. I gues that is because everybody has his own personality and life..

in Ben an Michales case, I think the work together pretty good. both leave each other space enough to live their own life, but also try to fit in the others life.. soemthing we don't get at all with David..

what do you think don't make them a good couple Fiona?