For me it was a war of attrition. First GH1 was released, and I read a number of glowing reviews, but the idea just sounded kind of childish, playing a little plastic toy guitar?! Then Penny Arcade kept going on about how wonderful it was. Then GH2 was released, and got even better reviews. So I finally thought, what the hell, I've got to check out what all this fuss is about. So, I bought GH2, and just a week later I also bought GH1, because I was already addicted.