Classics

So, my literature loving friends, after a summer of mystery and trashy biography reading, I've decided to spend the fall and winter (re)reading some classics.  Trouble is, I cannot decide which ones.  So help me out.  Which classics are not-to-be-missed?  Post in the comments.   (You can leave off any Jany Austen, as I reread her at least once a year, no Shakespeare since that is where I live, and I've already decided that the Brothers Karamazov is already on the list).