I can’t say that I’ve ever seen enough personality from any of them to have a favorite, and the bits and pieces I have heard about their supposed behind-closed-doors personalities has never really painted any of them in a particularly favorable light.
I watched The Crown and found myself wondering how accurately their personalities were being portrayed because the most surprising part of that series, for me, was just how deeply unlikeable all of the characters were. I already knew Philip was a jerk, but I didn’t expect to dislike pretty much everyone else as much as I did. It took until Sydney the Valet showed up in Season 5 before I felt there was anyone with any redeeming value in the whole lot of ‘em.