Youthful Indiscretions

What books read by the younger you do you look back on and cringe at? 

I have to say, though there are many books that I now recognize as absolutely terrible (I'm looking at you, Valdemar books and Anita Blake), there are none I'm actually ashamed of having read and enjoyed.  One should never be ashamed of things that brought one joy, even if they no longer do, even if you now violently disagree with their premises, or your taste has totally changed.  They were there when you needed them, and even if you've outgrown them, you should be grateful for what they gave you at the time.