Because I kinda asked to repost over here, books are a favorite hobby.
Just like movies and anime -- which I may mention later -- I'm fond of a couple genres and if I just said something like, "I like $author the best", that'd be too limiting.
My favorite genres are "fantasy" and "science fiction". People tend to combine both, but the generes don't always combine -- although it can be a Reese's Peanut Butter Cup moment when they do ("You got your fantasy in my science fiction!" "You got your science fiction in my fantasy!" "Mmmm!").
I like books possibly because I went to school to become a creative writing teacher. I eventually realized it'd take waaaaay too long to realize that dream and life's too short.
Anyhow, some of my favorite writers:
* Charles De Lint (fantasy)
* Arthur C. Clarke (hard science fiction)
* Rudy Rucker (von Bitter) (even harder science fiction, non-fiction)
* Piers Anthony (F&SF -- but generally not the Xanth books and his co-author works generally suck)
* Douglas Adams (humorous writings, non-fiction -- although I didn't like The Meaning of Liff)
* Michael Shermer (non-fiction)
* Terry Goodkind (well, his first three books)
* Terry Jones (humorous SF)
* Terry Pratchett (humorous F)
* Spider Robinson (humorous SF, non-fiction)
* Robert Heinlein (hard sf)
* Douglas R. Hofstadter (non-fiction)
* Scott Adams (cartoonist, non-fiction)
* Darby Conley (cartoonist)
* Stephan Pastis (cartoonist)
... and many more.