There was a poll done on about 4,000 Japanese people. These are for anime through 2000-2010 These results made me lol
Original websitehttp://anime.biglobe.ne.jp/userranking/title/6082/

1. Angel Beats!
2. Bakemonogatari
3. Clannad
4. K-ON!
5. Code Geass
6. A Certain Magical Index
7. Toradora!
8. Haruhi
9. Gintama
10. A Certain Scientific Railgun
11. Ore no Imouto
12. Full Metal Alchemist
13. Durarara!!
14. Gundam Seed
15. Mahou Shoujo Lyrical Nanoha
16. GitS: Stand Alone Complex
17. Darker Than Black
18. Strike Witches
19. Aria The Animation
20. Working!!
21. Eureka Seven
22. Kamichu!
23. Lucky Star
24. Black Lagoon
25. Planetes
26. Hidamari Sketch
27. Air
28. Mushishi
29. Hayate no Gotoku!
30. Elfen Lied
31. Sayonara Zetsubou Sensei
32. Scried
33. Fafner in the Azure
34. Baccano
35. Shakugan no Shana
36. Bleach
37. Gun x Sword
38. Slam Dunk
39. Honey and Clover
40. Basilisk
41. Aoi Hana
42. Cowbop Bebop (Knockin’ on Heaven’s Door)
43. Naruto
44. Jewelpet Tinkle
45. Sousei no Aquarion
46. Bamboo Blade
47. Inuyasha
48. Solty Rei
49. Zipang
50. Sky Girls