How much do you talk with the GM about the kind of game you want? Or to your players about the kind of game they want you to run? Do you prefer a "this is my game, take it or leave" approach from the GM, or do you build the whole premise collaboratively from the ground up? Or somewhere in between?
Does the way you handle this issue vary depending on whether you're playing or game-mastering? That is to say, do you prefer a collaborative approach when you're a player even if you're pretty much "take it or leave it" when you GM yourself? Or do you encourage player participation in the premise when you GM, even if you're happy to leave that work to your GM when you play?
Does it matter if you're putting together a brand new group or running for a group you've had for ages? When you're starting a new group, do you decide on the premise and then recruit players for that, or recruit players and then work on a premise together? When you're coming up with a new game for an old group, is it usually built on conversations you've with them over the course of the last game, or are you more likely to pitch them an idea of your own more-or-less cold?