If you liked the Melancholy of Haruhi-chan Suzumiya anime, the Anime-Planet community thinks you'd like:
In the future, select humans have begun to evolve and acquire special ESP powers – powers that the rest of the populace fear and detest. While some ESPers are harmless, others desire to use their powers for their own personal gain. In order to suppress this threat, identify new ESPers and protect those with powers from the public, the B.A.B.E.L. organization is founded. At its helm are three ten-year-old ESPers: Kaoru, Aoi and Shiho. Together, they will put a stop to crime and attempt to gain the trust of the public; but can their guardian, Kouichi Minamoto, manage to help the girls mature enough so their selfish actions will stop hurting the world around them?
crazyness, fantasy and an unfortunate, yet otherwise able hero are what these animes are about.
I would say that ZKC is not as crazy as the absurdity haruhi-chan, but it is more crazy than haruhi. But really, both shows are about crazyness caused by one (or three) girls, and the guy who has to put up with them. Poor Minamoto and kyon