Interesting to me that on so many of the longer lists there'd be books I loved and books I hated. Yes, taste in fiction is truly more subjective than in most any other art IMHO.
Here's some of mine (with some repeats from above:
THE WAY WE LIVE NOW, Trollope's masterpiece of Victorian England but really no more intimidating than GONE WITH THE WIND
HUMAN CROQUET by Kate Atkinson about a young woman in 1980s London who thinks she losing her mind
CHRISTODORA by Tim Murphy, the AIDS crisis seen through many interlocking NYC characters
A HANDFUL OF DUST by Evelyn Waugh, post-WW1 London that goes to many unexpected places, literally and metaphorically
Any of Barbara Pym's novels, though THE SWEET DOVE DIED and QUARTET IN AUTUMN are perhaps the most interesting because they're not about the genteel middle-aged women of her other books
MIDDLESEX by Jeffrey Eugenides about a trans person finding himself
REVOLUTIONARY ROAD by Richard Yates, about a dysfunctional 1950s marriage
LITTLE CHILDREN by Tom Perrotta, about a 2004 dysfunctional marriage
SLAVES OF SOLITUDE by Patrick Hamilton, about a group of people living in a shabby boarding house during WWII
ORDINARY THUNDERSTORMS by William Boyd, about a man in contemporary London on the run from a murder he didn't commit
ARMADALE by Wilkie Collins, a true Victorian page turner about two young men, one rich and one poor
A FATAL INVERSION by Barbara Vine (pen name of Ruth Rendell), a Hitchcockian thriller about a murder cover-up years after it occurred
BEAUTIFUL RUINS by Jess Walter, comic novel somewhat centered around the making of the Taylor Burton Cleopatra
HEADLONG by Michael Frayn, about the discovery of a long lost Breugel painting
THE CUSTOM OF THE COUNTRY by Edith Wharton, the foibles of a beautiful bourgeois American girl trying to find a rich husband
THE SLAP by Christos Tsiolkas, the repercussions among working class Australian friends and neighbors when one of their children is slapped
THE SINGER'S GUN by Emily St. John Mandel, I love all of her novels but this somewhat neglected early one is one of her best, very Patricia Highsmith, yet better!
THE MAYOR OF CASTERBRIDGE by Thomas Hardy, a very modern late Victorian novel with incredible twists and turns
MUSIC FOR TORCHING by AM Homes, comic satire of suburbia on fire
NEXT! by James Hynes, about a hapless businessman trying to change his life
GREAT EXPECTATIONS by Charles Dickens, his masterpiece IMHO
And finally, CLOUD CUCKOO LAND by Anthony Doerr and CROSSROADS by Jonathan Franzen, 2 of the the best novels of this or any other year