Oh, yay! This is my favorite YYH pairing, though I do like Yusuke/Keiko. (But I always preferred it over Hiei/Kurama.) And I must say, you did them justice big time. I also loved the way you likened them to another of my favorites, Itsuki/Sensui.

I had realized most of your points, but one I overlooked was that the boys were both raised by merely their mothers. Thanks for sharing that. :D