Ouran High School Host Club makes my top 3 favorite anime list! Amidst all the gags and comedy, there are deep messages. Although there hardly seems like there is a plot at all, what with the infinite random filler episodes, but this is the type of story that is based on the developments of high school life, so there wouldn't be flying ninjas or anything of the sort to keep the story exciting. I can actually say I enjoyed the pointless events :)
The stereotypes in the show are what make it humorous, since the characters drastically overplay their set roles. What I love most about the series is Haruhi Fujioka. She is a truly strong-willed character with intelligence and a good attitude. Unlike the whiny, shallow girls in the other animes who depend on others, Haruhi has always been independent and responsible. I believe there should be more animes like this one!