I was exposed to JW's by my mother, who joined for the end of the world in 1975. She was DF'ed when it didn't happen, then went back without me. I joined as an adult after a difficult mental breakdown which accompanied substance abuse, and my mother sent God and Jehovah's Witnesses into my life to save me.
I was a fully immersed member, climbed the ladder quickly. I went from baptism in mid-1988 to elder in mid-1994. That's almost unheard of. It wasn't just so much a statement about my full participation. It was also a feather in the cap of the elder/pioneer who brought me into the JW's. So he fought hard in the back room to get me appointed.
Right away, I saw all the nepotism and double standards. Becoming an elder really helped wake me up.
The initial trigger was 1995’s change in the definition of “this generation.” It very much bothered me that such a hardcore teaching could be changed in a simple Q&A from a study article. I started researching stuff, but only within Watchtowers and a few scholars and clergy. The doctrinal change made me seek a career instead of an ordinary job, because I was sure I would grow old and die "in this system of things." I stopped preventing my wife from going to college, also.
As time went by, I was further bothered by more double standards- elders being allowed to remain elders if their "secret sins" were more than a few years old and nobody knew about them. Further favoritism for connected people bothered me, and seeing a few unloving treatments of members who had no connections was awful. I remained, but kept my eyes and ears open. In 2005, I finally asked myself why I wouldn’t just simply google “Jehovah’s Witnesses.” So I did, I followed wherever it took me. The most helpful information came from freeminds.org and jwfacts.com.
It was short work from there. I knew nothing of Ray Franz or the United Nations, and the depth of information available on the roots of JW's with past date settings and changes, Rutherford changing all the Russell stuff.
In 2006, I resigned as an elder and faded out completely by spring of 2007.