Some free to play MMO's (Blade and Soul / Guild Wars 2 from my personal experiences) have voice acting for side characters....Not like, side characters in the story or anything, no no no....

Side characters like a dude at a bar/cafe going on about how awesome the drinks are, or characters making a stupid bet about who can kill or get to a certain point before the other, THOSE kind of side characters whos only purpose is to add flavor to the world.....They have VOICE ACTING