For me, it was:
Growing up in a mainstream religion I knew wasn't true.
Wanting to know the bible, but no one's churches were teaching them much of anything about it.
Being at a very low point in an abusive relationship and begging God to help me and I would do anything.
Answering the door to a small child reading a verse from the Bible - I couldn't be rude and just send them away. The woman knowing her Bible and flipping it here and there as I fired my questions. Wow, I wanted to know the Bible like that!
Her showing me in MY bible that God had a name; my religion had not taught me that and I was mad and felt a fool.
They would come to my house every week for free? Yes!
But wait; not yet.
As bad as I wanted to learn the bible, I could never be a witness and knock on strangers' doors, so I was going to say no. But I had a small child and I knew I owed it to her to teach her truth, whatever that may be, and she could make her own life-or-death decision. In the end, that's why I accepted; I was never going to be a witness myself - too cowardly.
I loved the meetings. So different from the churches where some angry preacher was upset or emotional all the time; preaching the same old sermon. We got to participate. I know the born-ins see it differently, but it was very exciting for me.
There were many red flags and I was in and out for many years. Finally, when I was estranged from most of my family, I was baptized.