Of all the women in the Bible, Michal is the only one to express love - ahava - for her husband. While Isaac came to love Rebecca, and Jacob famously loved Rachel, Rebecca, Rachel, and Leah are not mentioned as being in love. Rebecca wants children, as do Rachel and Leah; between the two sisters Jacob becomes a commodity to be bartered for.
But Michal loves David, and he uses it to his advantage: on the outs with Saul, Michal lies for David and remains behind to delay her father so that David can flee, after which he seems to more-or-less forget all about her, taking on additional wives as she languishes in her father's household. Eventually she gives up on him, and her father marries her off to Paltiel, with whom she seems to have a pleasant domestic life.
But after her father's death and the death of Jonathan her brother, David remembers Michal, the woman who could give him an heir who would have legitimate claims to both royal dynasties. She is ripped away from Paltiel, much to his sorrow, and returned to the royal harem.
When David dances before the Ark as it is being processed to Jerusalem, he earns her scorn: "How honored today is the king of Israel who has exposed himself today to the eyes of his servants' slavegirls as some scurrilous fellow would expose himself!"
We are told that Michal never had children, and I believe it is because Michal would have nothing to do with him. David placed his passion for God over and above any passion he might have had for Michal, and that was wrong.
Whatever you may be passionate about, be it your God, your job, or one of your hobbies, make sure that you are even more passionate about the people you love.
