For those having issues with jets, try my keyboard layout. I made it "sane" as I can never do inverted. If I want to go left I press left god damn it.
It's actually very responsive and I was used to this setup within a couple flights. I'm dog fighting like a pro now.
Throttle Up: W
Throttle Down: S
Yaw Right: Right arrow key
Yaw Left: Left Arrow key
Pitch Down: Down arrow key
Pitch Up: Up arrow key
Roll Right: D
Roll Left: A
Fire: Space Bar
If you need to do inverted, modify accordingly, but this takes the mouse out of the equation and is very comfortable.
Edit: This also works well with helicopters once you get the hang of it.