Here is my embarrassing list.
=Noteworthy
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:
https://commons.m.wikimedia.org/wiki/File:Discworld_Reading_Order_Guide_3.0_(cropped).jpg#mw-jump-to-license