Is there an anime series/movie you think is underrated?

I honestly think that the Rosario + Vampire anime and Digimon: The Movie are underrated.

Most fans of the R+V manga often dismiss the anime as terrible, and I honestly don't know why. The only problem with the anime is that there weren't enough episodes (they probably could've made more than 12 episodes).

I honestly don't know why the Digimon movie was hated by critics. The animation was fluent, the voice acting wasn't half bad, and the action was awesome. And let's not forget the kickass soundtrack.