Classic?

What makes a book a classic?  Here are some of my thoughts:

-teaches a lesson (ex: don't commit adultery--or you'll end up miserable: Anna Karenina)
-changes your life (The Giver)
-haunts you (The Hunger Games)
-makes you miss the characters after you're done reading it (Harry Potter)
-takes the country by storm (Twilight)
-makes you smile and cry (The Guernsey Literary and Potato Peel Pie Society)
-you would recommend to almost anyone (Goose Girl)
-makes you laugh so hard (The Sweetness at the Bottom of the Pie)
-inspires you to follow your dreams (Listening for Lions)
-eats away at your soul (The Scarlett Letter)
-makes you feel accomplished (Jane Eyre)
-a great love story (Persuasion)

What books do you consider to be classics?

Ender's Game vs. Gathering Blue

I really disliked Ender's Game because of the language and violence.  I thought the idea of a futurisic society with kids as the heroes was interesting, however.  I would recommend, Gathering Blue by Lois Lowry if you are looking for a futuristic story.  This is a companion book to, The Giver.  Kira is a talented needleworker and must use her talents to help the government.  She is assigned to fix the Singer's robe, which tells the history of the world. It is thought provoking, sad, but filled with hope.

Ender's Game Rating: F
Gathering Blue Rating: A