When I was a teenager, some of my favorite books were Timothy Zahn's Thrawn trilogy and some of the other extended universe novels. I stopped when I got to high school. Years later, I checked up on the extended universe and found that writers really went nuts with the continuity. It's kind of a slap in the face to be told that the mythos I grew up with isn't going to be canon, but then again, since the history of storytelling, aren't there multiple versions of every mythology anyway?