Do you actively play favorites with or have a favorite offspring? - please be honest. Honesty is the only way to reach a solution.
No. I absolutely, 100% honestly do not have a favorite. I have more latitude with my daughter-H sort of lets me do my thing with her as far as dressing her, putting her to bed, etc. I've felt closer to her as a direct result of my being able to be a Mom to her. With S6, things are just different-mostly because I think H views S6 as a mini version of himself. When I try to mother S6, H views me as trying to control HIM. It's very odd. And S6 is old enough to see that H and I disagree on things and he plays it a little I think. For instance, I prefer him to dress himself when I get him ready in the mornings. When H gets him ready, he'll dress S6 and on a few occasions, S6 has looked over at me and smiled a sly grin. But I honestly love them both the exact same.
Your next question is going to require more thought....I'm pondering it. There's a multitude of reasons, all valid, I just need to think about what they all are, from his perspective.
"Happiness is a butterfly, which, when pursued, is always just beyond your grasp, but which, if you will sit down quietly, may alight upon you."