HUN, you crack me up.
Seriously though, of all things that use to bit me was people not shutting down the heater and tripping the overheat. Operating in a cold climate this was a real pain as it can't be reset inflight.
Also do the owner a favour and abide by the engine/egt cooldown on the ground. You can get away without 1 inch per minute in the approach as long as you give it around three minutes cooldown on the ground and get the egt down, saves the turbocharger.
With thousands of hours on this type I'd say it's a great aircraft.