Self study
I self studied just because I had always wondered things like "how does a pilot know where to go ? There's lots of weird coloured lights on the runway and taxi ways", "how does the pilot know where he is and where to go to ? What does he do if he gets lost ?" etc etc
I enjoyed self study because it answered all of these questions. The great British weather managed to cancel quite a few lessons and the study / exams filled in the time as there was nothing else to do.
That said, it's horses for courses.