I remember always using inverted Y axis as a kid. This was mostly due to playing lots of flight and space sim games. I continued to play like this for 30 years. I used to play inverted for Q2 & 3 in my teens and twenties.
I must admit that during the Quake days I occasionally had to second guess myself during a game. Target is top right? Better put the mouse bottom right kinda thing. This disconnect manifested more and more as I spent more time using a mouse for desktop work. However, when I played any FPS on a controller I continued to invert Y.
Then something weird happened. I stopped playing FPS games for a year or two. When I came back, inverted made zero sense to my brain. I've got no issue using inverted for vehicles and such but once a targetting reticle gets involved I can't invert. It throws me for a loop.