I remember how as a child I loved reading from my dad's collection of Classics Illustrated comic books -- he had a large box full of them. In school I had only a little exposure to the classic works of literature, but have been really enjoying them for the last several years.

While the classic novels are my favorite reading, I like to add variety by venturing into some modern novels, biographies, history (relating to cultures rather than wars), plays, a little fantasy/sci-fi (the ones that focus more on ideas than on technology, especially Ursula LeGuin), and even some of the better childrens/young adult fiction (I highly recommend Philip Pullman's "His Dark Materials" trilogy and Susan Cooper's "The Dark is Rising").