I'm probably an oddball. I like Historical fiction and historical non-fiction. I like vampire novels, native american fiction, historical romance and just other books here and there.
Have not read any of the Harry Potter books. Did read the Hobbit years and years ago in school.
Favorite authors include Poppy Z. Brite (VJ I still have the photos), Stephen King, Jean M. Auel, W. Michael Gear/Kathleen O'Neal Gear, Sue Harrison, William Sarabande, V.C. Andrews and Catherine Coulter.
Jean Auel did the Clan of the Cave Bear series.
W. Michael Gear/Kathleen O'Neal Gear do the People Series, which is wonderful. Reading their latest one now, People of the Moon.
William Sarabande (pseudonym, writer is actually a woman) did the First Americans series.
Sue Harrison is a native american fiction writer.
Poppy Z. Brite does vampire/horror books and other things.
Catherine Coulter does historical romance and other genre (I think mystery).
Of course most everyone knows Stephen Kings genre is horror.
As far as one single favorite book, I don't think I have one.