I find it very interesting that Ya'akov, who grew up in a household where parents played favorites (with some bad results), chose to play favorites with his kids as well, again with results that had severe consequences for his descendants for hundreds of years.
Another consequence of his actions, of course, was the creation of this number. :)
(Warning: women dancing in this video... so don't click if it offends)
(As many of you know, I love Broadway musicals... and Joseph is one of my favorites).