I could see Vrykul and Furbolgs representing differing sides of real-world cultures. I could see furbolgs representing a more Gaelic-like culture, of course dwarves share some Gaelic and Norse undertones, Furbolgs could represent a more tribal Pre-Roman Gaelic type culture with tribal paint, spears and swords and tribal clothing with a mixture of brutish armor. They (and Azotha) could also fit the gentle giant (especially Polar Furbolgs; do you know how big Polar Bears are!?) and barbarian archetypes that the Alliance is kind of missing. Azotha kind of fit the Human Barbarian-Type and could draw some cultural basis from Norse and possibly even a bit from Sub-Saharan African-warrior culture.
Vrykul could embody a sort of dark-side of Ancient Norse Culture. Rape, Enslavement, Greed, Raiding and extortion. You could really show the dark side of Vrykul, but also add a RP Norse Fantasy, small coastal and forest villages with gigantic men with long braided beards, eyeliner and axes walking around and beautiful tall women. Lore-wise those, I'm pretty sure Vrykul women are mostly assigned to taking take of the house, but I'm not 100% on that.
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Of course I know they were in the Alliance at one time, so were the people the Lordaeron, but they joined the Horde. In fact, Gilneas didn't even need to rejoin the Alliance, they were pretty much annexed into the Alliance by the Kaldorei. Before you say that the forsaken were turned away for being undead, the worgens themselves aren't in a better position. Worgen themselves are a mongrel race, no different from Gnolls or Troggs. Simplistic, Instinctual brutes, Gilneas only gave them a slightly more viable chance to join the Alliance.
Pandaren also assisted in the building of Orgrimmar, pandaren are just a lawful good race that helps everybody.
So I basically correct about draenei....
http://wow.gamepedia.com/Parkat_Steelfur
http://wow.gamepedia.com/Ergh_of_the_Stillpine