Three Words:
Bring. Back. Kotaro.
Negima is no longer a Harem manga first and foremost, but a Martial Arts Manga that just happens to have Harem Elements. Yet the crew of the animation held Akamatsu sensei's intent in utter contempt, unable to extract their prosteriors from their fecal-excretory-openings and still unable to get over Love Hina.