What are the funniest anime series that you've ever watched?

[Konoka]

So, I'll start off. These are the series that had me laughing so hard I cried:

1. Acchi Kocchi
2. A-Channel
3. Baka to Test to Shoukanjuu (both seasons)
4. Beelzebub
5. Binbougami ga!
6. Boku wa Tomodachi ga Sukunai
7. Danshi Koukousei no Nichijou
8. Hayate no Gotoku (the original 2 seasons; the current Can't Take My Eyes Off You season isn't that funny :S)
9. Kamen no Maid-Guy
10. Kimi to Boku (both seasons)
11. Kodomo no Jikan
12. K-ON! (both seasons)
13. Kyou no Go no Ni
14. Lucky Star
15. Mayo Chiki
16. Minami-ke
17. Nagasarete Airantou
18. Nichijou
19. Ore no Imouto ga Konna ni Kawaii Wake ga Nai
20. Seitokai no Ichizon
21. Seitokai Yakuindomo
22. Shinryaku! Ika Musume (both seasons)
23. SKET Dance
24. Toradora!
25. Working! (both seasons)
26. Yoshinaga-san Chi no Gargoyle
27. Zero no Tsukaima

From the current season:
1. Chuunibyou demo Koi ga Shitai
2. Ixion Saga DT
3. Sakurasou no Pet na Kanojo

[Einzo]

Wow! That's a long list! Haha! I like Sakurasou from this season of anime! Damn funny! Also coz of Mashiro Shiina!