Attack on Titan - 1
I really really enjoyed this. I read the first couple of volumes of the manga some time ago, so I don't remember much about it, and I'm not sure if I want to continue reading it, I'd much rather just enjoy the anime if they keep the same level of quality throughout the show. We all know that it won't look this good ALL the time, but I'd love to be surprised.
But yeah, great atmosphere, music, animation, tight direction, I couldn't be more happier.
I did enjoy the first episode of Magi too, though...