Most people like to crow about how many genres of music they like as if that makes them a better or more interesting person (which, of course, it does*).
But you don't hear very often people openly admitting they only like a few types of music.
So who is prepared to admit that they are stuck in a groove?
And what genre(s) do people think are most likely to attract the most slavish worshipppers?
I'm guessing metal but that's just from personal experience and may not be true.