My all-time favourite is Code Geass, but I haven't watched a ton of anime in a couple of years. Behind that is Kyou Kara Maou, excluding the existence of the 3rd season. I like both of those for very different reasons.
My favourite anime movie is Howl's Moving Castle, and I also own the book, which adds a whole new level, as I'm sure you can imagine.
It was the first anime I ever watched, and nothing has ever quite lived up to it since.
So far I'm torn between Durarara, Cowboy Bebop, and Ghost Hound.
Cowboy Bebop is my current vote.
Ooooohhh hard one... I'd say Fullmetal Alchemist and Ouran High Host Club, but if you were to say manga I'd say Black Butler, Naruto... etc... I haven't actually seen the anime for Naruto, but I tried Black Butler and I hate the voice that Ciel has.
this is a hard question to answer but i at least know i love Code Geass, Black Butler, Darker than Back, Oran Highschool Host Club, and Eden of the East ...lol i know that's a lot but i cant choose :b
Death Note or Black Butler.
Sir, I am currently obsessed with Black Butler. Sebastian is like adfknqowfnocnolqwneflniorn :3
Gundam 00. Death Note was good but I didn't watch much after what happened to L. I haven't seen all of the Gundam shows yet. I'm doing my best to watch them in chronological order (in universe) which is hard because the UC universe is huge. I refuse to watch G Gundam anymore because it just sucked. But Gundam 00. Love it.
Hungry Heart, Fullmetal alchemist brotherhood , Howl's moving castle, Spirited away. I love them all