To me
normal is console-ish and 2-dimensional. Inverted is immersive.
We (GUI developer) did 3d control testing late 80's and early 90's. (Back then normal was usually called inverted) Y-axis inversion preference was split. When compared to each user's computer experience, it was almost always the newer users who preferred what we now call normal. They often complained about switching between one direction for moving the desktop pointer and another for "moving their head". More seasoned users had less of this problem and were in a kind of suspension of disbelief, moving their 3d point of view without any thought of the cursor. Opinions varied depending on 3d task & world, user time with arcade games, and experience with flight (real or not). Later, console defaults seemed to influence people toward today's "normal".
Whatever. If we learned anything, it's that some people are world-centric, others are cursor-centric. Give them the choice.
Just wait until drive-by-wire takes over you try to take your SO's toyota to the store with her cusomized X-Box3 controls.
