Attack on Titan is a simply masterful series; an extraordinary visual composition, a soundtrack that still sends chills down my spine just thinking about it, and a relentless, beautifully written story. I put it up there as one of the best television series of all time without reservation, along with the modern Battlestar Galactica & Firefly. Another recent anime I deeply enjoyed was Psycho-Pass. It explores a dystopian world where every persons psychological state can be scanned by sensors; the series follows a group of police officers tasked with hunting and dispatching the seriously unbalanced and psychopathic before they can cause further psychological harm to society. It's a really fleshed out and deep examination of the consequences of such a technology, and doesn't pull any punches.
Psyco-Pass seems like a really cool series. I might have to check it out next time I get in an anime mood.