According to several sources C.S. Lewis and J.R.R. Tolkien were both believed to be INFP personality types on the MBTI. I didn't know Lewis and Tolkien were friends, but I believe we are drawn to those similar to us in personality traits, as those similar to us process our respective realities in similar ways.

I am an INFP, as is my partner, and we are both drawn to art created by those imagined to have the same MBTI personality types as us e.g. David Lynch, Donald Glover (Childish Gambino), as well as Lewis and Tolkien.

Simply an interesting observation.