I think Jester and Metallica have the best points. If you are practicing good throttle management, know how to use the rudder properly, and can fly at least a Sig Four-Star, Tiger 2, or similar plane comfortably, and can handle engine failures and stalls while remaining calm without having to think through your procedures, that indicates an intermediate skill level. It means that you have control of the plane; it's not controlling you.

NorfolkSouthern