I don't have a clue why my marriage works! On our first date I fell in love and have been for the last 36 years. We started off living together immediately after our first date and did so for the next two years. I told her just say when on marriage and she did, thankfully. We had similar family backgrounds and had some strange coincidental connections that we found out about latter.
We worked together many years in low paying jobs managing someone else's business. Went back to night school together. Got government jobs with upward mobility around the same time. Discovered camping, gardening, dogs and cats (but no kids by choice,) love to travel together, drink and dine together.
I cook and buy groceries, do minor home repairs, deal with various vendors inside and outside the house. She shops for clothes and gifts, does the laundry and cleans house. We both like to read, watch movies and TV, and veg out at home.
We rarely seek the company of others. She's the introvert, I'm the extrovert. (Although we've found she is the one people feel comfortable with, I usually establish the contacts.) She's a Taurus, I'm a Leo and neither of us takes the stars or religion seriously. We are both liberal Democrats who vote but do not participate in politics otherwise.
We've slept in the same bed for all but 2 or 3 nights since our first date. In less than six months, we will find out how we fare in continuous retirement. I seriously doubt we won't be able to survive that together either.
I mind the finances, (now that we have some,) but she is fully informed, has access to all the accounts, and although she often says, "Do what you think is best," we always make group decisions on the big purchase items.
But I don't have a clue what rules to follow seeking the perfect mate. I have seen some strange combinations seem to work but haven't a clue as to how. I think its mainly just luck and I'm lucky in love and it pretty much cures all ills.