So much truth to this. It really shows sometimes, too, even with a single voice actor. Case in point: Call of Cthulhu: Dark Corners of the Earth. There were times where the main character would be in some mind-twistingly bizarre situation and would comment on something like he was making a snack recommendation to someone he didn't really like... but other times, there was a real sense of confusion and fear being conveyed. It was clear that the voice actor was actually making an effort but hadn't been given clear context on all of the lines.Dastardly said:What we say can reveal facts about the world around us. How we say it reveals who we are in that world. Too much dialogue is written from a "what" standpoint rather than "how."
As to the voice acting... I think the cardinal sin is recording lines in a vacuum, devoid of context. I can't tell you how disheartening it is to be playing an otherwise great game, but hear a botched exchange like:
"That guy is never on time."
"I know, it's like he wants to get fired."
And all you're left thinking is, given the context, it's obviously meant to go, "I know, it's like he wants to get fired." And it becomes obvious that the voice actor was working with half the script.
Giving voice actors context and letting them play off of each other always helps, especially when the actors are good at what they do. Disney tends to grasp this.