Each character he creates serves a unique purpose in the story, and it's likely he sees them all as valuable contributions to his works.
However, we can guess that he likely has a soft spot for certain characters, like the underdog protagonists who often face challenges and find strength within themselves.
Some of his most popular characters include:
* Stanley Yelnats IV from "Holes" - A resilient and resourceful boy who faces adversity with humor and determination.
* Cheddar Man from "Sideways Stories from Wayside School" - A quirky and lovable student who always finds himself in comical situations.
* Hershel Periwinkle from "There's a Boy in the Girls' Bathroom" - A shy and misunderstood boy who struggles with social anxieties.
Ultimately, which character is Louis Sachar's favorite is a matter of speculation. But it's safe to say he finds them all important and engaging in their own ways.