Further to my post above, my greatest fears are:
1. Mid air collision (my CFI and his student, and another CFI and his student, were all killed in a mid-air collision alongside Mangalore, Victoria, about 3 years ago.) TCAS should be compulsory in ALL aircraft IMHO.
2. Mechanical/structural failure resulting in loss of control. I always try to remember the secondary effects, elevator failure then use engine, aileron failure then use rudder, rudder failure then use aileron. But still ….. !
3. Forced landing from engine failure. Gliding down at the right speed OK. But ….. Finding and making it into a good spot! Things you might see from above like rocks holes etc.!
I am a super safe pilot, but we can only mitigate the above things to a certain extent. Being aware of them helps to be able to mitigate them. Fortunately, they are rare.
I still fly despite the above things. As my CFI used to say, nervous OK, paranoid not OK.
Cheers
Frank