I'm a Harry Potter fan...actually I don't know if the term "fan" would be correct. I enjoy the books and films, but I don't have any posters on my walls or anything. I like Harry Potter, that's all. It's easy, interesting, and enjoyable. Many people don't like it (mainly metalheads) because it's somewhat overexposed, and when something becomes well-known or mainstream, for some reason metalheads automatically disassociate themselves with it, regardless if they enjoy it or not.
Case in point: Dethklok. I still love the show even though it's really big now, but there are lots of people who don't watch it anymore simply because there are some mainstream metalheads who like it. Metalheads are always on one extreme or another, especially in the states; either they're completely devoid of any knowledge of music besides what's force-fed to them on Headbanger's Ball, or they're so tr00 and kvlt and underground that anything on a semi-large label is shit because more than 5 people know about them. You'll see this a lot with the Harry Potter people. There are some who genuinely dislike the franchise and always have, and there are some who, just for the sake of being snobbish pricks, loathe it as well but only for the sake of trying to separate themselves from everyone else. These people would eat shit just to be different...regardless of how idiotic the idea is. It happened to Dethklok, The Simpsons, The Family Guy, Harry Potter, and many others. They can't feel high and mighty and condescending anymore because other people know about "their little secret", like they own it or something. Bah.