I generally play a barb. Love me some melee an I know what to expect.
I think the better question is do you prefer ranged or melee? Honestly, I love ranged classes and will go with DH first but Barb was REALLY fun.
WD seems like it might be a more unique experience though. I am afraid it will end up being like the Necromancer in D2 and not be viable in higher difficulties.