I realized today that I have never posted my KJV-Only story on my blog. Around the time I graduated from High School, our church was without a pastor. We routinely had a guest speaker at our church who was in the KJV-Only camp. Don't get me wrong, I have no problem with people who simply PREFER the KJV. But this guy went way overboard. He actually took other Bibles during a sermon and made fun of them before dropping them from the platform unto a table below. He used scholarly argumentation like saying 'the message' was the 'mess' of the 'age.' And the NIV must be satanic because there is nothing 'new' under the sun, 'international' means it's part of the coming 1 world satanic government,' and it was really a per-version, not a 'version.' I remember talking to him one Sunday night about this subject and he took the opportunity to inform me that in heaven we will encounter, I kid you not, God the Father, God the Son, and God the King James Version.
James White, in his book "The King James Only Controversy" points out that there are 5 different types of people sometimes labeled KJV-Only. The first group just prefers the KJV (nothing wrong with that, it's a great translation!). The second group feels it is based on better (though not perfect) manuscripts. That's a fair position to take too. The third group goes a bit further by saying that the manuscripts on which the KJV is based have been supernaturally preferred or even inspired. This seems, to me, to be getting too far down the road. The fourth group believes the KJV itself was inspired in English. A fifth group actually believes the KJV is new revelation. In other words, if the KJV goes against the manuscripts, the KJV is correct.
The motivation of KJV-Onlyists is usually quite natural. Humans like certainty. They want to be certain that we have God's perfect Word. But, in my opinion, it is unnecessary to assume that the only (or even that the preferable) way for God to preserve the Scripture is to preserve it through 1 particular English translation.