I have written a long answer to this question on Minimus' similar Thread, about did we believe the Witnesses were the one true religion, but no, I was never a 100% believer, from a very young age I found the explanations of how a small Cult following Judge Rutherford fulfilled some great bible prophecy too hard to swallow.
Of course they subsequently changed some of that, but I still could not swallow the "new light".
I was embarrassed by "100% JW's", they seemed to be so gullible to me, and to speak in platitudes and gushing praise of what I saw as a very imperfect religion, even my own relatives who I respected in other areas of life.
I am proud to say I was never 100% a JW, ashamed to to acknowledge it took me WAY too long to fully wake up and leave.