Not a personal conviction

A personal conviction means:

It is something between you and God (Rom 14:22).

You cannot impose it on others.

Others may hold a different view and still honor Christ faithfully.

What is Verbal Plenary Preservation (VPP) and KJV-onlyism?

KJV-onlyism = the belief that the King James Bible is the only inspired or perfectly preserved Bible.

Verbal Plenary Preservation (VPP) = the belief that God perfectly preserved every word of Scripture (in the original languages) and that these preserved words are found exactly in a particular text form (usually the Textus Receptus or a narrow line of manuscripts).

Are These Just Personal Convictions?

Not exactly:

If held privately (e.g., “I personally prefer the KJV; I believe it is the most faithful for me and my family”), then yes, it is like a personal conviction. That falls under Romans 14—others should not despise or condemn.

If imposed on others (e.g., “Only the KJV is the Word of God, all other versions are corrupt, and you sin if you use them”), then it ceases to be a personal conviction. It becomes a binding doctrine placed on the church. That goes beyond Romans 14 and enters into division and legalism (Gal 5:1; Col 2:20–23).

Summary

As personal preference/conviction: Acceptable, like a choice of diet, worship style, or music.

As enforced doctrine: Problematic, because it adds a human tradition as a test of fellowship, which Scripture forbids (Titus 3:9–11).

So: KJV-onlyism and VPP can be personal convictions if held humbly and privately.

But when elevated into a requirement for all Christians, they become divisive errors rather than personal convictions.