A witch hunter will be my first try in open beta. But I intend to try most things out before headstart gets here, so I can't really answer the question yet
I usually play pet classes. Warlock in WoW, Mastermind in CoX and Necromancer in AoC.
So i thought i'd play a shaman in WAR
Plus the cinematic was great. That fighter casts that spell just to stop the Chosen's mace and Chosen just knees him and spell comes off and bye bye human, smashes his head in.