I dabbled in preterism (before I realized there was a name for it) before realizing deciding the bible was bull butter.
Back then, several passages made it seem to me that the 70CE fall of Jerusalem was the main event to which bible writers were pointing. (Also considering the 'great trib which has not occurred, no, nor will occur again' text.)
For example, Luke 9:27 (NIV) says....
"I tell you the truth, some who are standing here will not taste death before they see the kingdom of God.”
JWs, among others, would have believers think that Jesus was foretelling the transfiguration, which occurred 8 days later. That was ridiculous to me, since it would've been superfluous for him to say 'some standing there wouldn't die before it happened.'
Seriously, would that have been necessary to say?? How many of them DID die within that 8 days? BUT if the focus was on the 70CE destruction a few decades later, well then it would make a little more sense that some would die and others would survive in that time frame.
Of course, now I realize that the gospel was just another collection of writings, susceptible to the errors and disinformation of other records from that era.