Love Flowers for Algernon. Also Fahrenheit 451, Lord of the Flies, Catcher in the Rye. I'm a sucker for Of Mice and Men as well. And I taught Animal Farm for four years and really grew to appreciate the connection to the Russian Revolution.
I thought Tess of the D'Ubervilles was depressing as hell, but loved Hardy's The Mayor of Castorbridge and Far From the Madding Crowd.
Somerset Maugham's Of Human Bondage
Hamlet (and if you can see the National Theatre Live production with
Rory Kinnear, he is the best Hamlet ever)
Of Mice and Men
One Day in the Life of Ivan Denisovich
Cry, The Beloved Country