I chose the paladin threads, those are always fun. But you forgot, "[X] setting sucks, but [Y] setting is awesome." You know you have a winner when you can swap X and Y and 90% of the posts in the thread are still applicable.
Crunch = Lots of detailed stats blocks with as much system-specific info as possible.
Fluff = The broad strokes only in written and/or published material - the prime example being Original Greyhawk and even Living Greyhawk Gazetteer where the MOST information given on an NPC is Class, Level and Alignment, and the rest left completely nebulous and up to GM's to fill in.
At least that's my best understanding of the discussion, and it usually breaks RPGers into Categories of Ultra-Crunchers, Ultra-Fluff Lovers, and lots of in-between. Sort of mirrors politics in real world heh lol?