I find that the people that I have observed in my adult life - the balance, happiness, success, etc.. of their relationships with significant others has the majority of the time been directly related to what their parents' relationship was. Please speak up if you don't believe this trend is true - I am open to anyone's differing opinion If you had adopted parents or a step parent who was there for almost all of your life feel free to substitute that for the equivalence of "birth parents," however, a step parent that was only around like half the time certainly does not count. I believe that the reason so many people have so many problems finding a person they can stay with for a long duration is because so many of us do not or never had any good role models to observe for how relationships are supposed to work. And in my humble opinion, small doses of exposure to successful relationships outside your family setting are definitely helpful but are in no way a substitute for "the real thing" which is 2 parents (gay or straight tyvm) who you can observe on a daily basis making their relationship work for many long years.
Completely agree I think the most important is what you experience while growing up. The parents that had a good relationship are in my opinion good models, even if they later (when the children are grown up) experience a midlife crisis and split up.
Virtually nonexistant for 4 years,then non-existant forever. Coulda' been worse. I might have been born a worm.