Brief thought exercise: if your parents' marriage is great (bad), will similar elements of your marriage be great (bad)?

[youtube http://www.youtube.com/watch?v=LbKS1XNc6Po&w=600&h=315]

Start with a baseline assumption of two parents that stayed together and had a relatively happy marriage -- or, if you want, two parents that ultimately separated but maintained a functional, happy environment for the children involved. In either of those situations, are the eventual relati…