The reason I like subtitles is probably because I'm a purist. I like to see an anime - or any type of film from another country - in its original language. That, and because I've been watching anime for quite a while now, there have been some shocking examples of dubbing over the years. It's improved a lot. And it's true that there are some bad examples of subtitling - I've seen a couple. Still, for the most part it's ok.
