EDIT: Best Of'd by Andy
I hear people talk about this all the time. "The GM writes the plot for the game," and variations thereof. I've played every RPG there is, for decades, but I have yet to do this, or play in a game where it happened. My curiosity has been piqued by the recent Ars Magica thread.
So, what's it like? What does the GM do? What do the players do? Please share your experiences.
There are three rules for this thread:
1. No passing judgment on others! Judge your own experiences if you want to, but lay off other folks.
2. Say whatever you want about whatever games you want. There are no debates about games allowed here. Take them to other threads. If you are tempted to say, "You don't understand game X," cram it.
3. No debating what "plot" really means. Just answer based on whatever you think it means.