My first choice will always be non-fiction with a definite edge to true crime stories.
My wife once asked me why I read all those type of books and I told her..."I just want to know where they went wrong, so I don't make the same mistakes."
I also like biographies if I find the subject interesting.
As for my fiction tastes, they fall along the lines of mysteries and suspense thrillers.
I occasionally enjoy good novels though.
I just finished reading Kane & Abel and The Fourth Estate back to back.
Is it me or did the author, Jeffrey Archer, write the same book twice and just change some charaters and settings.
A tip for the King lovers. This probably isn't news to you but Dean Koontz's early works are a good rival to early King.