In general: Hajime no Ippo
Josei: Chihayafuru
Sports (that isn't Hajime no Ippo or Chihayafuru): Kuroko's Basketball
Action (that isn't Hajime no Ippo): Fate/Zero
Fantasy: Fullmetal Alchemist
Sci-fi: Steins;Gate
Comedy: Midori no Hibi
Dystopia: Psycho-pass
Shonen action-adventure : Hunter x Hunter
Mecha: Tengen Toppa Gurren Lagann
Romance: Kimi no Todoke
Drama: Haibane-Renmei
Slice-of-life Usagi Drop
Horror: Higurashi
Mystery: Hyouka
Steampunk: Last Exile
Cyberpunk: Dennou Coil
Magical Girl: Madoka
Ecchi: Mayo Chiki!
Seinen: Mushi-shi
Shoujo: Card Captor Sakura
Person in a Strange World: The Twelve Kingdoms
Mind-screw: Kaiba
Samurai: Rurouni Kenshin