It should go without saying that parenting is anything but predictable. Since I'm in the stage of having young children, I can really only speak from that vantage point. From routines to likes and dislikes, our kids are constantly evolving, and our challenge is to keep up with that and not lose our minds in the process.
My daughter has always been a great night-time sleeper. Napper, not so much, but nighttime, excellent. Minimal if ...