Protector, Ringworld, The Integral Trees, The Smokering - Larry Niven
The Moon is a Harsh Mistress, Time Enough for Love, Friday - Heinlein
Against a Dark Background, Excession! - Banks
The City and the Stars/Against the Fall of Night, Childhoods End - Clarke
The Cities in Flight series - Blish
The Chrysalids, The Day of the Triffids, The Midwich Cuckcoos - Wyndham
The End of Eternity, The Foundation series (just the first 3) - Asimov
Dune - Herbert
Dragons Egg - Forward
The Skylark Series - EE "Doc" Smith
Dragon Flight - McCaffery
Footfall, Lucifers Hammer, The Moat in Gods Eye, The Burning City - Niven & Pournelle
The Long Habit of Living, The Worlds series - Joe Haldeman
Strata - Pratchett
Tiger Tiger - Bester
Now, if I were to turn around and look at the bookshelves behind me... But no. We'd be here all day.