treeplanter
Mongoose
Well in the first case you are more board gaming than role-playing, as it become a cooperative board game against the DM (like Descent, heros quest).
I would say something between your 2nd and 3rd point. The GM is the narrator along with the player, but his weight is greater. I think it is fair and representative that the GM adapt to player actions. In the end, you're the judge of player's action no matter what so either they accept your judgment or fight you every time they don't agree (wich I think is NOT a good thing).
Just take this exemple. The PC have digged up informations about an important Nobles and come up with a good plan to ambush him (from my point of view). If I screw them up by changing his feat at the last minutes so he have reflexive parry then I'm kind of an ass.
On the other hand let consider the same PC group but there's a guest players playing a thief, and instead they just go to that nobles houses and kick the door, and begin to kill everthing in their attemp to get to the Noble room, and from my point of view it is utterly stupid. Even tough I have nothing prepared for this situation I'll make sure they pay for it and have them only barely succed by luck (if they succed at all). The Nobles might suddenly get a powerful bodyguard or a patrol of elite knight not far hear the manor's break...
I would say something between your 2nd and 3rd point. The GM is the narrator along with the player, but his weight is greater. I think it is fair and representative that the GM adapt to player actions. In the end, you're the judge of player's action no matter what so either they accept your judgment or fight you every time they don't agree (wich I think is NOT a good thing).
Just take this exemple. The PC have digged up informations about an important Nobles and come up with a good plan to ambush him (from my point of view). If I screw them up by changing his feat at the last minutes so he have reflexive parry then I'm kind of an ass.
On the other hand let consider the same PC group but there's a guest players playing a thief, and instead they just go to that nobles houses and kick the door, and begin to kill everthing in their attemp to get to the Noble room, and from my point of view it is utterly stupid. Even tough I have nothing prepared for this situation I'll make sure they pay for it and have them only barely succed by luck (if they succed at all). The Nobles might suddenly get a powerful bodyguard or a patrol of elite knight not far hear the manor's break...