I also use KJV for most of my studies mostly because I love my Thompson chain Reference Bible . It was basically what I was raised on. I think you definately have to go with something you are comfortable reading and can get the most out of as well as being sensitive to the Spirits leading. I am also aware of some Versions and how they leave certain ( IMPORTANT ) things out. I do not like this and look for the most accurate.
I like my grandfather do enjoy checking out other versions just for variety.