It sometimes depresses me that I've never met anyone with my exact taste in books. Here's the problem: I refuse to read exclusively within a genre. I've helped people select reading material at the library for over ten years, so I can safely say that most people tend to stay with the same genre/author/writing style without ever straying.
While I also have genres/authors/writing styles that I gravitate towards, they're so diverse I'm too difficult to pin down as a reader. I have a huge thirst for knowledge and I'm always fascinated by people and things. That's probably why as I child I read Anne of Green Gables and Egyptology books side-by-side. Some things never change. To give you an idea of what I like, last year I read romance, biography, science, mystery, fantasy, art, history (fiction and non-fiction), children's, YA, chick lit, reference, classics and travel books. And those are just the ones I can think of.
Yet I'm also quite deficient in some areas. I have yet to read an Oprah book all the way through and I tend to stand clear of them as a rule. I'm hopelessly lacking many, many classics (Alice in Wonderland, Lord of the Flies, The Catcher in the Rye...) I used to read Christian fiction back when I was young and pious, but I probably haven't picked up a Janette Oke in fifteen years. I'm actually kind of curious about some of the recent ones my patrons raved about, so I may even try one this year. I've never read a western, but who knows, I may step outside my comfort zone and try Longarm and the Wicked Schoolmarm. There's a lot of fantasy/sci-fi I'm not very acquainted with, notably Douglas Adams, Terry Pratchett and Neil Gaiman. I also avoid "popular" books like the plague (Danielle Steel, John Grisham, etc.) and I get bored silly by all the "gritty" police/crime/thrillers that are out there. But once again, I may give some a try just to see what all the fuss is about. I'm lookin' at you, Janet Evanovich.