I easily read more books by male authors. Nearly all my favorite authors are white males from the US or Britain. This bothers me slightly. I partially explain it away by saying, “I naturally am more affected by those who are more like me.”
But this is only a partial explanation. I suspect a lot of it has to do with shelving practices. I mainly read fantasy/sci-fi. Female and foreign fantasy/sci-fi authors tend to be put in Fiction and Literature, so long as their books do not involve Elves or dragons. I have no data to back this assertion up. It’s just something I’ve noticed walking around bookstores and libraries.