I read just about everything Orson Scott Card ever wrote after reading Ender's Game in 9th grade, including the godawful Homecoming series. In my defense, lots of people love Ender's Game, and we had no way to know he was going to turn out to be a total neocon crackpot. His writing changed a LOT over time, I can't stomach any of his books from the last 10 years, and even some of the Ender's Shadow series was a bit much.
I also loved the Redwall books and read each one when it came out until about the 20th one, when I realized that I had outgrown books about mice that live in a tiny mouse-sized abbey that talk and fight and feast. No shame over that though, I intend to force the Redwall books on my future children.
The only book I've tried to go back and re-read that actually caused me to cringe was The Dragon's Touchstone by Irene Radford. I have no idea why middle-school-me loved that book, but it was HORRIBLE when I tried to read it again in my mid-twenties. Like, the worst kind of sexism and casual rape nonsense EVERYWHERE.
@deepomega @melis A couple of my friends actually bonded over their love of The Courtship of Princess Leia and started a blog about it. Unfortunately, it went the way of many blogs and hasn't been updated in a while, but here it is: http://thecoplbookclub.wordpress.com/
From what they wrote, it sounds AMAZING. Or AMAZINGLY BAD. Either/or.