...ok, so flipping the y-axis.
I reckon that I do it because my first 3D game was Microsoft Flight Simulator (I haven’t looked this up but I’m pretty sure up and down are flipped in that game by default, like a real plane).
My brothers, meanwhile, who are all younger than me and had their first 3D experience on PS2/etc all prefer standard y-axis.
So what got you into flipped y-axis, if you use it? Something in real life that you were used to before getting into video games? One specific game that locked you into it?
Lots of people use only use inverted for flight. I am the same. For me Its like commanding a character to move forward but when imagining flying a plane i am imagining sitting in the seat with the stick and like you pull back to go up and push forward to descend there.