I love Gravitation. The humor's great, the art's nice (ending theme cinema = top of goodness), and it has some of the best music I've ever heard in anime. In fact, Yoko Kanno aside, the only anime music I like more is in Loveless, which is also a great show.

And we forgive you for disliking Gravi, K-chan, but only because you're obviously a Yami no Matsuei fan (another amazing soundtrack, by the way).