1984 by George Orwell
Catch-22 Joseph Heller
Dune by Frank Herbert
East of Eden by John Steinbeck
Good Omens by Terry Pratchett and Neil Gaiman
Snow Crash by Neal Stephenson
The Color of Magic by Terry Pratchett
The Lesson by Cadwell Turnbull
The Name of the Wind by Patrick Rothfuss
The Parable of the Sower by Octavia E. Butler
=Less Noteworthy
Black Sea Gods by Brian Braden
Mythos by Stephen Fry
Smallworld by Dominic Green
The One by John Marrs
The Unlikely Pilgrimage of Harold Fry by Rachel Joyce
The colour of magic isn’t highly rated by anyone. Most discworld fans will tell you to skip the first two books and don’t really count them. I hope you didn’t skip discworld based on that. If your willing to give it another go, most fans suggest starting with Guards Guards! as the feel of discworld is well established by this point and the Watch sub series is a fan favourite.
There are 5 main sub series; the Witches, Death, the Watch, Industrial Revolution and Rincewind. Rincewind is the least rated. You can read them in pretty much any order but each sub series is recommended to read in the reading order:
I was also bested by Dune. I never finished "To Kill a Mockingbird" in high school, and have never had any desire to pick it back up. The most embarrassing/shameful is... "The Lord of the Rings: The Fellowship of the Ring." I love the movies, and I love learning about the lore on YouTube, but I just cannot make it through that book. "The Hobbit" was such a fun and silly little story, and I loved it! Fellowship just reads like those chapters in Genesis that you tend to skip over.