Fantasy: All time fav is David Eddings. Infact reading his work got me into writing. I'm not into scifi as much, but I did like C.J. Cherryh's series.
Love Clancy, Griffin, Flynn...there's a few more, but it's too bloody hot for me to think of them. And, for an oldie but a goodie, loved Agatha Christi.
Oh, yeah, and of course, Ayn Rand....although I didn't read Galt's speach at the end of Atlas Shrugged all the way through the first time. I did the 2nd reading tho.