How could Lorewalker Cho's pointed poetry in The Thunder King trailer above not set your imagination tingling? I thought it lent great atmosphere and context to the patch trailer -- but leave it there, please, in the trailer. Woe to the character who breaks my immersion by speaking out unexpectedly in game. For me, gaming is like reading; when I'm deep inside either, I don't want to be jarred back to self-awareness by sudden speech, even with the voices of the characters themselves.
What do you think about voice acting within the game -- rich addition, or annoying contrivance? Would you like to see more or less spoken dialog in World of Warcraft?