I would have to say my all time favorite is Eureka 7, followed by Clannad. What's yours?
edit 1: holy crap over 1000 replies! I see we have tons of otakus here. Haha! Keep it up!
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Edited by Yukari: 3/4/2015 9:30:50 AMThe one where the girl gets sexed by a tentacle monster [spoiler]jk its watamote.[/spoiler]