Via world plus dog:
“Below is a Science Fiction Book Club list most significant SF novels between 1953-2006. The meme part of this works like so: Bold the ones you have read, strike through the ones you read and hated, italicize those you started but never finished and put a star next to the ones you love.â€
1. The Lord of the Rings, J.R.R. Tolkien *
2. The Foundation Trilogy, Isaac Asimov*
3. Dune, Frank Herbert (Hate, loathe, abominate this series. Hate. HATE. Stylistically abysmal, and jaw-droppingly sexist.)
4. Stranger in a Strange Land, Robert A. Heinlein
5. A Wizard of Earthsea, Ursula K. Le Guin* (but Tehanu will always be my favorite of that series)
6. Neuromancer, William Gibson
7. Childhood’s End, Arthur C. Clarke (Clarke’s long fiction behaves like L-tryptophan on me. Dunno why.)
8. Do Androids Dream of Electric Sheep?, Philip K. Dick
9. The Mists of Avalon, Marion Zimmer Bradley
10. Fahrenheit 451, Ray Bradbury
11. The Book of the New Sun, Gene Wolfe
12. A Canticle for Leibowitz, Walter M. Miller, Jr. * (An uncomfortable book, but a beautiful one. Skip the posthumous sequel; it’s garbage.)
13. The Caves of Steel, Isaac Asimov
14. Children of the Atom, Wilmar Shiras
15. Cities in Flight, James Blish (I really did read the whole thing, yes. Gets weird and sorta pointless toward the end.)
16. The Colour of Magic, Terry Pratchett (Love much Pratchett. Very much do not love this one. Rincewind is a creep.)
17. Dangerous Visions, edited by Harlan Ellison
18. Deathbird Stories, Harlan Ellison
19. The Demolished Man, Alfred Bester
20. Dhalgren, Samuel R. Delany (A grad-school book of the grad-schooliest sort. I have no stomach for grad-school books any longer. With Delany, I stick to the short stuff, which is excellent.)
21. Dragonflight, Anne McCaffrey
22. Ender’s Game, Orson Scott Card
23. The First Chronicles of Thomas Covenant the Unbeliever, Stephen R. Donaldson (Guh. Horrible. So bad I won’t read any other Donaldson.)
24. The Forever War, Joe Haldeman
25. Gateway, Frederik Pohl
26. Harry Potter and the Philosopher’s Stone, J.K. Rowling
27. The Hitchhiker’s Guide to the Galaxy, Douglas Adams*
28. I Am Legend, Richard Matheson
29. Interview with the Vampire, Anne Rice
30. The Left Hand of Darkness, Ursula K. Le Guin*
31. Little, Big, John Crowley[?]
32. Lord of Light, Roger Zelazny (Enh. The problems of repellent little ubermenschen forced to mix with the hoi polloi do not thrill me. I don’t like Amber either.)
33. The Man in the High Castle, Philip K. Dick
34. Mission of Gravity, Hal Clement
35. More Than Human, Theodore Sturgeon
36. The Rediscovery of Man, Cordwainer Smith* (Ah, lovely language!)
37. On the Beach, Nevil Shute
38. Rendezvous with Rama, Arthur C. Clarke (I did finish this one. Just barely.)
39. Ringworld, Larry Niven
40. Rogue Moon, Algis Budrys (The novella is better than its expansion into a novel.)
41. The Silmarillion, J.R.R. Tolkien (Doesn’t get a star only because parts of it aren’t all that lovable. It’s got some rattling good stories, though.)
42. Slaughterhouse-5, Kurt Vonnegut
43. Snow Crash, Neal Stephenson
44. Stand on Zanzibar, John Brunner
45. The Stars My Destination, Alfred Bester* (I wish I didn’t love this book sometimes, because ol’ Alfie was an unreconstructed misogynist. But I still love this book.)
46. Starship Troopers, Robert A. Heinlein
47. Stormbringer, Michael Moorcock
48. The Sword of Shannara, Terry Brooks
49. Timescape, Gregory Benford
50. To Your Scattered Bodies Go, Philip Jose Farmer (They’re all dead. I don’t care.)
And a similar meme surrounding female sf/f writers (via):
The meme is this: go down the list and bold those writers whose work you know you’ve read, and list the most memorable or significant-to-you work(s) by that writer that you’ve read (or put “all” if the writer’s that good!). Italicize those writers whose work you’ve tried to start reading, but have bogged down, stopped, or not gotten to it for whatever reason. Strike through those writers whose work you’ve read and just can’t stand.
If there’s a writer missing whose work is SF/F and significant to you, then add her in the appropriate alphabetical location!
Margaret Atwood (The Handmaid’s Tale, of course)
Leigh Brackett (I don’t find her stuff memorable, though my husband absolutely loves it. Pulp in the Edgar Rice Burroughs vein.)
Marian Zimmer Bradley (World plus dog has read Mists of Avalon, but I actually remember Bradley best for the stories collected in the Lythande collection, one of the earlier and better contributions to the rapidly-devolved-into-garbage Thieves’ World series.)
Lois McMaster Bujold (I can read the Miles Vorkosigan stuff, but I’m not rabidly fangirly about it. The Curse of Chalion and Paladin of Souls I get rabidly fangirly about. Hope the next book in the series is better than The Hallowed Hunt, however, because that one was rather a waste.)
Octavia Butler (Her shorter stuff, mostly. Butler makes me squirm, so getting through her books is hard, but it’s worth it!)
Suzy McKee Charnas
C.J. Cherryh
Jo Clayton
Diane Duane (Wrote a couple readable Star Trek novels, which sounds like damning with faint praise but isn’t, because novelizations are straitjacketed writing.)
Suzette Haden Elgin (Enh.)
Carol Emshwiller (Carmen Dog)
Charlotte Perkins Gilman
Barbara Hambly (Liked the sensible use of linguistics and the academic mindset in the first Darwath trilogy. Unfortunately, she turned it into a soap opera after that, and I completely lost interest.)
Nina Kiriki Hoffman
Nalo Hopkinson (Oo! Amazing! Loved Midnight Robber and the collection The Skin Folk.)
Diana Wynne Jones
Nancy Kress (The Beggars series, though I think it eventually went off the rails.)
Kathryn Kurtz (Not after Poughkeepsie.)
Ellen Kushner (Wow, her stuff is so polished. Swordspoint is my favorite. Didn’t care for Thomas the Rhymer, though.)
Mercedes Lackey
Tanith Lee (Another very polished writer. I like the Tales of the Flat Earth series, though I can’t get into her horror or YA stuff.)
Madeline L’Engle (Enh after the age of fifteen or so.)
Ursula K. LeGuin (All! Except for The Other Wind, which felt rushed and a copout, I’ve never read a LeGuin I didn’t love, and I reread her books more than anyone else’s.)
Doris Lessing
R.A. MacAvoy
Anne McCaffrey (Enh, and swiftly downhill from there. The Harper Hall trilogy is okay YA stuff.)
Maureen McHugh (Liked China Mountain Zhang, but it didn’t oomph me into reading more of her work. Probably too grad-schoolish.)
Vonda McIntyre
Patricia McKillip (I really wanted to like the Riddlemaster of Hed books. The worldbuilding is awesome—but she doesn’t do anything with it! Frustrating.)
Robin McKinley
Judith Merril (Read her more famous short works, but I don’t think that counts.)
C.L. Moore (Jirel of Joiry, of course, and “Vintage Season.” The Northwest Smith stories are okay in moderation, but don’t try to read them all at once, because they’re rather repetitive in plot and theme. At least read “Shambleau,” though.)
Andre Norton
Marge Piercy
Anne Rice
J.K. Rowling (When the fanfic is better-plotted and better-written than the canon…)
Joanna Russ (I know, I know, bad feminist.)
Melissa Scott (Burning Bright, because of its treatment of RPGing.)
Mary Shelley (Not in years.)
Starhawk
Sheri S. Tepper (Extremely unsubtle. Extremely. So much so that I have trouble recommending her even when her views dovetail with mine—which they don’t, always.)
James Tiptree Jr. (I am a BAD feminist. BAD. I did like “The Women Men Don’t See,” though.)
Joan D. Vinge (Enh. Living proof that women writers don’t necessarily write good female protagonists.)
Kate Wilhelm (I left a round tuit around here somewhere…)
Connie Willis (The Domesday Book is just as good as everybody says it is.)
Monique Wittig
Virginia Woolf (Okay, okay, I’ll turn over my feminist card peacefully; there’s no need to get upset about it.)
Authors I would add off the top of my head: Phyllis Gottlieb, Kij Johnson, Pat Wrede, Caroline Stevermer, Pamela Sargent, Elizabeth Moon, Pat Cadigan, Midori Snyder.