When I got my first Xbox, I had hell playing Halo and Call of Duty, until I found the look inversion in settings. I immediately got better at playing. My friends hated it when I came over to play on their console because I always screwed with their controller settings.

Look inversion always felt natural. I never played flight simulators either. It must have been something I got used to on an arcade game in the 80's. I have no clue what game it could have been though. I wish I had all those quarters back.