I cringed when I couldn't resolve that "God had a plan for me" when I was also taught that he had given me free agency.
I had a difficult time belonging to the "one true church", when so many people that I met of other faiths lived a life that was closer to Christ-like than mine.
Basically I regret spending years living a faith that revolved around guilt and fear.
But mostly, I want to ask for a big DO-OVER for the times where I got angry with loved ones when they confided that they weren't sure that there was a God. My impulse was to belittle them while covering my ears, refusing to listen to their reasoning. Now that my understanding of God has been "reset", I long for that understanding conversation. I have found that there is no soft approach to the subject, for the same reasons I had in shouting down the questioning of others.