In an interview with MTV, Daniel Radcliffe talks about why Harry Potter fans benefit so much from the fact that the movies started out as books, and he compares it to the popular Star Wars and Star Trek franchises. He doesn't, however, argue over which franchise is "better", figuring that it all depends on what you define "better" as. He simply believes that all three sagas benefit from beginning as written word, and have intense character relationships and growth.
Maybe Daniel is just trying to be nice about the whole thing, but luckily Harry Potter fans can actually say which one they like the best. So vote on our poll and tell us what you think!