Mmm...nostalgia

. Reading this thread made me remember quite a few books I've enjoyed. But they are quite different from each other, so I've categorized them.
Great stories:
20,000 leagues under the sea (Jules Verne; the first novel I ever read)
The Mysterious Island (Jules Verne; not exactly SF, but connected to the above)
Foundation Trilogy (Isaac Asimov)
The Currents of Space (Isaac Asimov)
I, Robot (Isaac Asimov)
The Caves of Steel (Isaac Asimov)
Great storytelling:
Dune (Frank Herbert (1965); wow)
Frankenstein (Mary Shelley; excellent story)
Entertaining:
The Moon Is a Harsh Mistress (Robert A. Heinlein)
The Andromeda Strain (Michael Crichton)
Sphere (Michael Crichton; good book, not so good movie)
Interesting/weird:
Strange Case of Dr Jekyll and Mr Hyde (Robert Louis Stevenson; short but excellent)
Solaris (Stanislaw Lem; original and weird)
Rendezvous with Rama (Arthur C. Clarke; a masterpiece IMO)
The Werewolf Principle (Clifford D. Simak; original and weird)
Dystopias:
Brave New World (Aldous Huxley; classic)
Fahrenheit 451 (Ray Bradbury; classic)
1984 (George Orwell; classic)
Also, Philip K. Dick has written many good short stories. I like all of the books I listed, but the must-reads would IMO be Foundation Trilogy, The Currents of Space, Frankenstein, Jekyll and Hyde and Brave New World.