This illustrates my second big problem with GNS theory, the terms don't always match up with the meanings most people would associate with them.
Consider these three players:
1). The guy who enjoys playing in deep character.
2). The guy that wants as much realism in the game as posible.
3). The guy who just wants to sit around with his friends, roll dice and drink a few beers.
In GNS theory ALL THREE of these guys have a simulationist agenda.

You say you're a narativist at least partially. Would you disadvantage your character or even cause your character to fail to strenghten the story's theme? If not, then you're not what Edwards considers a narativist.
Sam