No, really. You should read The Silmarillion.
I love mythology in general, but Tolkien’s is, by far, my favorite. I know it’s not “technically” mythology, in the same sense that Greek, Roman, or Viking mythology. However, that was Tolkien’s intention: To create a mythology of sorts for England.
So, yes. It’s my favorite mythological universe. I heart it with many hearts.
Grace & Peace,