Going out in service as a kid, excuse me, I mean youth , I remember one door we went to the person gave us a pamphlet, and tried to explain to us why Witnesses were wrong. We left, and in the car I asked something to the effect of "Since we have the truth why didn't you just prove him wrong?" I was brushed off with something about apostate material. That never sat well with me.
Later, shortly after I was baptized I remember a person who became one of the anointed class. I had asked how he became one and they had said it was through prayer and guidance from the holy spirit, or something like that. That didn't answer my question, and it just led to more questions like how do they know when they had 144,000? Shouldn't there have already been 144,000 early Christians long ago? These questions begat more questions, and so on until I became disillusioned with the faith, and stopped going out in service then the meetings. For the longest time though I still didn't do a lot of "worldly" things.