Boku dake no Madonna [僕だけのマドンナ] Man, I feel so jealous of "Kyon", he has it good. It would have been hard for me to choose between his ex or Surumi. Beautiful Story.
Gokusen [ごくせん] Good in-depth character development and humorous story. And on top of that Yukie is so funny in this series.
GTO [麻辣教師] Loved the anime and manga. Great series.