Yeah, this is also what I see as the main threat to my relationship with my wife: my complacency, taking it and her for granted. We both work hard on our parenting our 9 year old, and our careers, but then you need to spend the time with each other, lest you become roommates who run an unpaid childcare service on the side.

And I do wonder if this is about the engineer mindset ('I've reduced this to a previously solved problem, I just let the subroutine handle it') or about the way that men are socialized in my culture (just take her out to dinner twice a year- Mother's Day and Valentine's- and remember her birthday and you're meeting social expectations) or what. But it's the biggest threat to my (and I'd hazard a guess most other) marriages.