Hello,
Personally I would like to see (or rather hear) voiced NPCs. For me it is convenience thing, because I read a lot of tech literature for my studies and I hate reading from a monitor. This is probably the main reason why I haven't finished Planescape: Torment.
Other question would be, does it fit in the budget? I have don't know how much does it cost to voice a game or make it in a first place (It only cost a lot of time in my experience). In case it doesn't fit I wouldn't mind little sacrifices just not in the story department.
What is your opinion on this mater? Do you like to see voice-over in Project Eternity? What are your feelings about voice-over in general?