Defining normal

I recently came across a blog focusing on "Normal Christianity".  While I didn't read the blog, it did trigger some thoughts in my thinking.  What comes to mind when you think of normal Christianity, or  as I would prefer "normal Orthodoxy"?  You first have to define what is meant by "Orthodoxy" and then define what you mean by "normal".  And then one would need to articulate the means and "rules" of how those definitions were determined.  In essence, what authority does one use to define the rules for defining those terms.  In short, what constitutes reality.
Oof, that is a handful (or a headful to be more precise).
To answer these questions, at least for the Christian, one needs to explain and articulate how we read the Bible the way that we do and who we look to for interpretive direction.  Obviously, if you asked an Evangelical, a Protestant,  a Roman Catholic or an Eastern Orthodox Christian what consists "normal" Christianity, you would receive pretty radically different answers.  Why?  Because how they interpret and what they recognize as authority in things spiritual, are different.
So then, what about you?  I, being Eastern Orthodox, look to the historic church and what it has always believed through these last twenty centuries, as authoritative.  The Calvinist will look to a logical, systematized handling of Scripture for their interpretive efforts.  The Roman Catholic will do a combination of logical, systematized interpretation, historical Roman Catholic tradition and papal decree.  The Protestant/Evangelical world will use a wide variety of interpretive tools/imagination in handling text or making doctrinal proclamations.
So defining normal does not come down to "common sense" or "just read the text", but religious authority.  And understanding what that means and the how that authority possesses the authority it does is the pinnacle of importance.