I feel like Call of Duty 4 modernized and standardized the FPS genre on at least consoles. Every call of duty game still looks and feels exactly the same since CoD4 and every other first person shooter copied it's control scheme because it was so firmly cemented.
You said helicopters "just fall" when they lose power. That's what spawned this tangent. You didn't specify anything about the engine being seized, which is an additional issue.
You are moving the goalpost, and asked someone to apologize to you for it. You're a clown mate.
Real world weapon customization comes to mind. Other than that I don't know, I haven't played Halo 3.