What bible do you trust most, and which one do you trust least?
Putting the small attempt at humor I made above to the side, I'd have to admit that in my own more existentio-evidentialist mode of reasoning as a Christian Philosopher, I don't think in terms of the question, "What Bible [or which Bible version] do you trust the most?"
Rather, I think in more historical and existential terms of the question, "What is the Gospel of Jesus Christ and the Kerygma by which His diverse
Ecclesia have expressed His Gospel?"
It's not really merely a matter of deciding which English version of written remnants from the past (i.e. the Scriptures) we must most account for and adhere to. No, it's a matter of how much willingness and ongoing commitment we each have to understand that which Jesus of Nazareth, our Lord and Savior, has injected into the historical spaces of the World in which He has placed us to live.
I think we in the English World need to get over two things here: 1) Placing too much focus on having, or deciding upon, a finalized, English version of the Bible when it was never given in English in the first place, and 2) stop avoiding from having to do, at the least, some moderate work both individually and collectively for a better understanding of the historically instantiated Message God has given the World through His Son.
But to ask, "Which English version is best"? is to play a game of veiled one-upmanship over and against each another. I don't think that Jesus or His Apostles would have approved of all of the social nuances which can exist within that veiled, and sometimes clearly unveiled, contention among those of us who claim the mantle of "being a Christian." We can do better than that and realize that all attempts to translate the Scriptures are limited; we can also refrain from thinking that reading a favored translation, in whatever language, somehow guarantees that we're in perfect sync with God's Will.
[P.S. ... just to be useful, and to answer more concisely and relevantly your question, I'll briefly mention that for most of my Christian life I've read and studied from the NKJV and the NASB, but this doesn't mean I haven't occasionally used the NIV or the RSV-with Apocrypha.]