It didn’t happen often, but when the Queen’s poker face cracked into a beaming smile, it was front page news! After more than half a century on the throne, Queen Elizabeth II had famously perfected not only the art of keeping a straight face, but the ability to keep her feelings about members of the royal family private. Behind closed doors, however, the monarch, a woman of strong opinions, definitely had her favorites. Here’s how the royals rated in Elizabeth’s affections. Meghan MarkleKing Charles IIIPrince William & Prince HarryQueen Consort Camilla Parker BowlesPrincess AnneKate MiddletonP…