Okay. Let's do something that does not involve 7.3 or 8.0 as a relaxation.
Here's the deal. We all know the classes. We all see how relevant they (or their corresponding society: Cenarion Circle, Earthen Ring, Ebon Blade etc.) are to the story. We all have an idea how fun they are to play, how many legendaries they can obtain, how cool their order hall/campaign/artifact weapon/champions are, and how their equipment looks.
Taking all of this into consideration, if you could only pick one class. One single class. As if Blizzard one day decided to remove all classes from the game except for one. Which class would be it? Which is THE world of warcraft class?
I'm not including Demon Hunter in the Poll as it skips over almost the entire game.