Story's much the same here. I was the 'weak' one, my leaving was never really triggered by one event, but a culmination of seeing the total injustice of the JW 'justice' system, the obvious good old boy network that existed in the elder/c.o./d.o. (and above) arrangement. Not too mention the sheer boredom of the meetings/mags/books/conventions, the generation flip-flop was probably the doctrinal issue that caught my attention the most, though by that time I was already 'weak' By that time I was already faking the 1-2 hours of FS a month, and only attending the occasional Sud/Thurs meeting. My wife was trying to attend more, but out of guilt - she hated the meetings too, but felt guilty if she missed one 'without a good reason'. Needless to say no-one really cared to find out what the 'problems' we were having were. Of which I'm glad - we had had enough of the fake 'concern' in our last KH.
It also helped that we had been involved in a different (non-JW) group of people (non-religous too) and saw ALL of the same group dynamics that existed in JWs - the politics, the gossip/back-biting, etc. Helped us realize that all groups of people interact in the same way, and that JWs are no different than any other group - men use the group to promote themselves in all cases. Men use groups to position themselve into power over other people in all cases. It the nature of man. Of course the flip side is that there were many good people in that group too - people who were genuine, and showed us that the 'world' wasn't exactly the demonized, crazy nasty place we were raised to beleive.
I guess the strange thing about our exit is that no one event triggered it, no point in time did either of us say "That's it we're done". I eventually just stopped attending, no one cared, and the demons didn't pop out of the walls and grab me. My wife hung in a while longer, but the obvious lack of love in the congs we were around didn't make that any easier - she eventually whittled down to no meeting attendance too. I didn't go looking for the JW web sites for a long time, just mainly because I didn't think I cared, but finding out ALL the info about them was eye-opening to say the least. My wife finds much of this interesting (the UN, child molesting, coverups, etc), but for the most part has moved on to other things in her life. I guess I'm the one with the latent feelings of madness
The best part of it all is that once the exodous was complete my wife's health almost overnight improved 100%, the stress/guilt she placed herself under constantly HAD to have triggered the problems. Once she learned to live life guilt free, things were so much better. We're happier together, and still have common interests and goals. So we walked out about as well as I think is possible!