Manual flight
Good thought! I used to fly the S61 helicopter which had no automatics, no flight director, just artificial stabilisation and a heading hold so all IF was hand-flown. I still have memories of ADF/ILS approaches with the stab off in the simulator. Now that was hard work.
So, I have been flying the 737 manually including ILS's. I'm not sure if its 100% realistic as it doesn't seem to hold a trimmed attitude very well. I had no idea about power settings so that was interesting but managed to fly the ILS down to minima without exceeding the limits.
Keeps me off the streets in me old age.