Attack on Titan was pretty great. I hate to be "one of those" but I do think it's better going into the anime with the manga in mind (available in the US or wherever you get your manga). For a creepy, sad, yet hopeful story, the PG-13 vibe of the anime doesn't really hit at the same emotional gravity and overall fear the characters experience (of course, this is one episode, we'll see what happens with the next episodes) . Nevertheless, the artwork is great and the production values look pretty top-notch.
I don't recommend much, and I've loved the hell out of what people have recommended here, so this is mine -- please watch, but also read, Shingeki no Kyoujin/ Attack on Titan -- it's really intense.