You may say that, but in the industry, it is common knowledge that if you have to use a monologue (in film, tv, vg, books), you have failed. If you can tell a story and involve other characters, it becomes much more interesting to the everyone. Why do you think most monologues in movies are actually voice overs? Because a single actor can't hold everyone's attention the way multiple actors can.
Just imagine hearing one voice for an entire game, with a 5 minute monologue for every single quest, and you can't skip it. You would go insane! Now throw several different voices and personalities in there, and it is now not only bearable, but enjoyable and interesting.
And what does RPG stand for? Role Playing Game. You are playing the role of a character. If you want to play the role of someone you can completely create on your own, write a book.
Whew, I'm a little bit late on my reply for this one. I haven't been keeping track of this thread much.
Firstly, I did put up with monologues for an entire game back in the first two Diablos and I have to say I thought they were very effective story telling devices. I loved them in Morrowind too. Monologues I find are able to get more lore into the game efficiently which dialogues simply can't do as well. You'll always have those superfluous answers from one of the speakers (ex. "Indeed." "I didn't know that." "I feel fine, how are you?") I do acknowledge however that not everyone will share my sentiments and that dialogue has its advantages as well. Looking at Warcraft and Starcraft however, I don't find dialogue has ever been Blizzard's strong point. The way the write it has always sounded a bit stilted to me which is more evident in Warcraft than in Starcraft.
And yes, I know that I'm playing the role of a character who has some pre-existing traits. I just don't like having the character's entire personality handed over to me. I think RPGs are more engaging when they leave more to the player while maintaining a skeleton personality for the character.
And keep in mind that monologues are not devoid of artistic integrity and interest. Shakespeare soliliquies come to mind. I don't think there should be any shame in using a monologue system.