1 Pokemon

2 Naruto

3 InuYasha

4 Fullmetal Alchemist

5 Spirited Away

6 Fruits Basket

7 Wolf's Rain

8 Shugo Chara

9 Shugo Chara Doki!

10 Kekkaishi

11 Darker than Black

12 Darker Than Black:
_{Gemini of the Meteor}

13 Vampire Knight

14 Loveless

15 Rosario Vampire

16 Fullmetal Alchemist:
_Brotherhood

17 Ouran High School Host Club

18 Black Cat

19 D.N. Angel

20 Rurouni Kenshin

21 Princess Mononoke

22 Castle in the Sky

23 Howl's Moving Castle

24 Tales from Earthsea

25 InuYasha: The Final Act

26 Death Note

27 Ghost Hunt

28 D. Gray-Man

29 Elfen Lied

30 Angel Beats!

31 The Vision of Escaflowne

32 Black Rock Shooter

33 Maid Sama!

34 Gosick

35 Ao No Exorcist

36 Shinrei Tantei Yakumo

37 Anohana:
_{The Flower We Saw That Day}

38 Hidan No Aria

39. Sword Art Online

If anyone has any animes they believe are a must watch, feel free to let me know! I'm not big on cute, fake happy animes just so you know, but if you know of any intensely dark animes with action I'd be glad to check 'em out!