I'll tell here a lot of animes, after you read this, you can study them as you please xD.
Beelzebub - Action, Comedy, Demons, School, Shounen, Supernatural (60 episodes)
Chobits- Comedy, Drama, Ecchi, Romance, Sci-Fi, Seinen (26 episodes)
Death Note- Mystery, Supernatural, Police, Psychological, Thriller (37 episodes)
Detective Conan- Adventure, Comedy, Mystery, Shounen, Police (695 episodes NOW (AIRING) )
Fairy Tail- Action, Adventure, Comedy, Fantasy, Magic, Shounen (175 episodes)
Gintama- Action, Comedy, Historical, Parody, Samurai, Sci-Fi, Shounen (201 episodes)
Gintama' - Action, Comedy, Historical, Parody, Samurai, Sci-Fi, Shounen (51 episodes)
Love Hina- Comedy, Ecchi, Romance, Shounen, Harem, Slice of Life (24 episodes)
High school of the dead- Action, Ecchi, Horror, Supernatural (12 episodes)
Jojo's Bizarre Adventures (2012)- Action, Adventure, Shounen, Supernatural (26 episodes)
Kaichou Wa Maid-Sama! - Comedy, Romance, School, Shoujo (26 episodes)
NANA- Comedy, Drama, Music, Romance, Shoujo, Slice of Life, Josei (47 episodes)
Naruto Classic/Hiden - Action, Comedy, Martial Arts, Shounen, Super Power (220 episodes)
Naruto Shippuuden- Action, Comedy, Martial Arts, Shounen, Super Power (310 episodes NOW (AIRING) )
One Piece- Action, Adventure, Comedy, Drama, Fantasy, Shounen, Super Power (592 episodes NOW (AIRING) )
Tari Tari - Music, School, Slice of Life (13 episodes)