I've 'listened' to it 6 times on audio but 5 times was the KJV. (I get bored at work) The NWT while having pleasent readers has horrible grammer... 'he proceeded to say'......'and God said Let light come to be...'
As for actually reading. 1 time in the NWT for bible readings over 5 years. Once in the KJV and once in the WEB for my project.
The KJV is useful for english idioms we often use that come from the bible.