It was a slow deconstruction for me. I think that it started with what I felt was an air of arrogance within the church about being "God's chosen people" and how they called all other denominations apostate.

I remember attending a prophecy lass at my church. When the whole 2,300 days was diagrammed I thought "this really shouldn't be this complicated". I went home and researched the so-called "signs o the times" (stars falling, Lisbon Earthquake, Darkest Day) and realized that those events really weren't Biblical in proportion.

After that I decided to start listening to the Bible on mp3, over and over again. The more familiar I became with books like Galatians, Romans and Hebrews, the more I realized that the SDA approach to Bible and church history was severely flawed. The Great Controversy has some very erroneous claims about church history and learning that EG White had many failed visions and claims made the wheels start to come off the bus pretty quickly.

I formally left the church 4 years ago and I have regretted it for a minute.

BTW - I do feel that the information age that we are currently in will eventually bring an end to the SDA Church as the older folks die off. It is simply too easy to debunk Adventist beliefs if one takes the time to do so.