Least favorite: War and Peace (Tolstoy can't compete with Dostoyevsky.)
Yes, so true! Dostoevsky is so engaging and to the point, even across 1000 pages like in
The Brothers Karamazov, and only one chapter that I recall that was explicitly a vehicle for philosophical exposition (nothing against these sorts of ideas, but if you're going to tell a story, make it work in that context!) I read
War and Peace hoping for a similar thrill, and it started out well enough, but as you go on the narrative starts to become more and more sparse, and the historical and philosophical expositions start to become more and more dense, slogging through the same arguments over and over again; by the end, the book is barely readable, but I somehow finished it. Ugh.
Other books I have not particularly cared for are Kate Chopin's
The Awakening, Charles dikeens'
A Tale of Two Cities, and Thoreau's
Walden. Too bad my high school didn't assign stuff like Thomas Hardy, Oliver Goldsmith, and Oscar Wilde.
edit: Oh, yeah... Upton Sinclair's
The Jungle. I understand that it's historically significant and did some good from a journalistic standpoint, but as a novel... ouch. The protagonist deals with so much tragedy that it's beyond unbelievable and just becomes funny, and then at the end finds salvation through Socialism... right. It's just, again, so terribly expository that it is immersion-breaking (to use a term we all love so much) and awfully written; political bias is not my issue here, I assure you.