I'm 71. I became a JW in 1973 during all the pre-1975 hype. Looking back I had about one or two years when I was totally into it, a few years of hanging out with JW friends, got married, and just wanted a normal life with wife and children. I was not very into it for a number of years.
The Watchtower's position on higher education was the issue that finally pushed me over the edge. I wanted a good life for my children. Wife (also a convert) and I DA'd ourselves in 1989 after a year of independent study at the library and joining an XJW support group. (That's what we had before the internet )
All three children have college degrees, two have advanced degrees and the third is thinking about picking up a Master's.