Perhaps for vocabulary, instead of "natural" we could say "most convincing" system I've heard. For all the caveats of recording technique, mastering technique, and playback, I would argue we all are after the "most convincing" reproduction. Fortunately (or not!), "most convincing" would leave objectivists out of the discussion as there's no measure of "most convincing" (same too of "natural" as the case may be, though on this thread alone there are pages of argument).
"Most convincing" would allow for lots of subjective argument, but it would boil down to "most convincing—to me". I've heard some really great systems who's owner would argue his system is completely "natural" sounding but which lacked the dynamic visceral punch that is "more convincing" to me of what drums sound like. Sure that system had amazing tone and nuance to the sound of a drum whack, but lacked the ooomph! (I know, highly technical terms here!)
"Most convincing" would allow for lots of subjective argument, but it would boil down to "most convincing—to me". I've heard some really great systems who's owner would argue his system is completely "natural" sounding but which lacked the dynamic visceral punch that is "more convincing" to me of what drums sound like. Sure that system had amazing tone and nuance to the sound of a drum whack, but lacked the ooomph! (I know, highly technical terms here!)