From the people I know in real life who play this game, I could state it like this:
Extroverts: Druid, Warrior, Paladin, Rogue.
Intermedium: Hunter, Shaman, Monk
Introverts: Warlock, Mage, Priest, Demon Hunter, Death Knight.
Many chose the class not because they identified with it, because it was more OP or more fun.
That case is me, I chose the Warlock because I find it fun and it is easier for me to find groups. But if I had to choose 1, I would choose the Paladin or the Demon hunter, since they were my favorites from Warcraft 3 and the ones I have the most fun with with their lore.