Yes, Vayne's quest is epic, it is just told so badly! And him going insane in the end was a cop out methinks. The story writers realized that the plot was too ambivalent for the average gamer and decided to make Ashe = good, Vayne = bad in the last 5 minutes of the game, all of a sudden.

I agree with sword. The people who wrote the bestiary cards and the NPC dialogs wrote a lot better stories than the main scene writers (they were two different teams BTW)