[quote=Phoenix]
I didn't bring this up because it happens all the time. In fact, I haven't had this happen often. It was just something I was curious about. One particular example is someone not liking a particular rule that has little to nothing to do with the RP experience itself (of course, that might be debatable since it's in the RP to begin with). If they were to bring up the fact that they don't like the rule and don't wish to follow it, should that rule be reevaluated or should it be imposed regardless?What about things like the requirement of using the exact CS format suggested/requested by the GM. Should a differing CS format, that has all the same information, be rejected?You know, stuff like that. One time things that might come up occasionally.Also, should RPers be free to suggest how one might run the RP or even the way a plot develops? How far is too far for an RPer to "go against" the GM?
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I think most rules should have a good justification; and when one of mine gets questioned, I can usually explain myself. If a sheet has it all in there, I'm cool with it. And if RP'ers suggest plot hooks, I'll definitely consider them and usually work hard to bring that into the story line. It's so rare to get that anyway that it seems a shame to waste it.

Where I draw my line with players 'going against' a GM tends to be the point where you are polite, say no, have your reasons, explain them and still get a lot of pushback, or where you're just always having to do a struggle with the same player over every detail -- that's when it's time for them to run their own RP. 

But all of this varies from GM to GM. It's a matter of the individual involved.