I'm one of the lucky ones, too. My wife wants to learn EVERYTHING! She says that when she gets her license, she's not going to be just a good looking captain, but one who can actually take care of any problems that arise. Some of her accomplishments are;
Main engine removing and reinstalling; the exhaust system (seeking a water leak), the injectors and fuel lines and the oil cooler. Also removing and replacing the starter motor so I can service it.
Generator; removing, cleaning and replacing heat exchanger, the inlet/exhaust manifold, the exhaust hose and next she's going to change the fresh water pump, thermostat and housing. Also removing and replacing the starter motor so I can service it.
Electrically she has installed the wiring for the new windlass, including the solenoid, the remote control deck receptacle and the chain stripper/hole fitting.
There are many other things she does including hanging out aloft when ever the opportunity arises.
I may become redundant soon, or have to start paying her, because I almost feel like a charter guest.