Imaro
Legend
I think that the fact that you can't come up with a better description is telling, though. It "playing to discover the GM's notes" somewhat blunt and unromantic? Absolutely it is. It's also a succinct description of the play. And, I one I willing admit to using myself. If your interest is in teasing out what's actually happening in play, so that you can do it better, a blunt, unromantic description is best. It's not a negative, though, because it produces fun play, it's just blunt.
I think a large part of the hostility that occurs in these threads is that a number of people have how they game as a core identifier of self -- it's important to their self image. So, any statement that seems to reduce the import of that becomes extremely fraught very quickly. It's why we get people trying to shut down these threads or lockdowns about terminology. If you use a positive sounding term for other gaming, it's bad, because it suggests that positive things isn't about your gaming. If you describe a process bluntly (playing to find out the GM's conception of the fiction vs living world, for instance), then there's a feeling that this is an attack on self. The people that hold gaming as part of their identity are always going to be resistant to any breakdown or analysis, because this threatens their sense of self.
If we can define it... why can't you accept it? In the same way you defined protagonism and many had too... without all the pseudo-psychoanalyzation about our thoughts, identities or beliefs?