5 animes every otaku have to see:
-Gintama (funniest-anime-ever)
-Lucky Star (+OVA)
-Genshiken (2 seasons +OVA)
-Welkome to the N.H.K (NHK ni Y?koso!)
-Sayonara Zetsubou Sensey (3 seasons +2 OVA)
they have thousands of references to the japanese/anime/otaku world