Fully Voiced comment: Yes I should have limited it to MMO. No other MMO in History is fully voiced.. Fallout(series)and DR2 are solo games.
EQ2 and LotRO, yes story lines, however, they are short and scattered through your questing. WoW even has class quests. However for TORO we are not talking about a tutorial, your entire storyline is different for each class, from begining to end. Yes there are shared quests, as there are planet quests, etc, but the story you get is different that the one a different class may have. though the quest end result may be shared.
Example, I'm on a class quest and talking to an NPC, I do all the interaction, the others get nothing. but if they are partied with they can help me torwards my goal, and if they also have something to do with the same I'll be helping them even if not on the same actuall quest.