My ST: Dominion campaign has a lot of player input, since they are in charge of the resistance movement. And they enjoy the proactive nature of the campaign.
This means we have to have planning sessions, with them evaluating what to do next. Following their planning sessions, I go away and write episodes based on thier planned actions.
But there are still episodes where I dictate the plot. And I control the flow of the campaign.
Greg
"The dreams in which I'm dying are the best I've ever had."
Madworld, Donnie Darko.