Anna, I identify completely! That's just the kind of reaction I get and I've also been campaigning for the joys of fanfiction since I began reading, maybe about six years ago.
I first heard about fanfics from my friends who were into it waaay before I was. My friends were the hugest Harry Potter fans in elementary school, and they began reading fanfics to sate their HP needs during the increasingly long wait between books. I was a little skeptical at first, especially since you have to weed through fics at FF.Net and I had to suffer from reading many unfinished-but-fantastic stories. As I ventured out into different fandoms, I got more and more into it and I haven't looked back since! :p
I honestly never thought that I'd be interested in writing fanfiction, but I was really inspired by a TV movie I saw lately, so I started writing my first fic after years of reading. It's fun, but I think I still prefer reading.
I mean, I enjoy having everything go my way, but I'm an inherently lazy person. That said, I've been thinking of writing a Troy fic now, which contradicts my vow to write one story and no more.
I'll have to see what happens though, because I realize that I once I start a story, I'm responsible for everyone who reads it, but I'm really bad at time management and school takes all my time.
In the meantime, I'm just going to keep reading, reading, reading!