I learned a lesson that I keep learning over and over, and that is that the most fun is to watch our main characters interact with each other. The most fun comes from their tight interaction.
It's like in politics: You can have great intentions for the world, but if you're not a good speaker and if you're not the sort of person that people can intimately link with, then it makes it very easy to say, "Well, they're not a nice person. "