According to survey at BiGlobe website, classic anime series Neon Genesis Evangelion and Mobile Suit Gundam topped survey on most influential, historic and memorable anime series.

Poll was conducted from March 2 to 9, 2012 with a total of 5,733 respondents.

Rankings

1. Neon Genesis Evangelion
2. Mobile Suit Gundam
3. Space Battleship Yamato
4. The Melancholy of Haruhi Suzumiya
5. Card Captor Sakura
6. K-ON!
7. Dragon Ball
8. Sailor Moon
9. NausicaƤ of the Valley of the Wind
10. Puella Magi Madoka Magica
11. Pokemon
12. Astro Boy
13. Lupin III
14. Ghost in the Shell
15. Mazinger Z
16. Lucky Star
17. Spirited Away
18. Princess Mononoke
19. Future Boy Conan
20. Akira
21. Doraemon
22. Touch
23. Sazae-san
24. Magical Princess Minky Momo
25. Macross: Do You Remember Love?

[Source]