I was in my father's office in the basement, on a nice Sunday morning, and he was pestering me about preparing my WT study. (I was about 20 years old) I looked outside, it was a sunny, happy day and I felt like crap, and depressed....and I realised at that moment that it was because of the meetings and everything that went with it.
So I told my dad that I wouldn't prepare that study or any other, and that I wouldn't be going to the meetings from now on. It came as quite a shock, even for me.
But I guess the real realization came afterwards while I was sitting at my computer.