Are you happy withh your class is atm?
I'm rolling a new Horde toon just to unlock some race. I've mained Alliance DK's, Paladins and Warriors (in that order) for years. I haven't played a Guardian since Wrath. I wasn't sure if I wanted to go with a Warrior or Guardian for my Horde. If the general concensus is that Guardians are happy, or at least semi happy, I'll go with Guardian. But if Guardian veterans aren't happy, then I'd just go with a warrior.