Originally Posted by
Emnesty
Attack on Titan is a must watch.
Tokyo Ghoul and Akame Ga Kill are 2 new animes that are really good.
Naruto is an amazing series to watch if you like One Piece. The first series(Naruto) is really boring and childish, but once you get to Naruto Shippuden it is just kick-ass. ESPECIALLY if you read the manga. Holy shit.
Sword Art Online II isn't as good at the first part of SaO but it's still a good show.
Code Geass is a must watch also tbh. Great story line.
If you liked Code Geass I would suggest Guilty Crown. It's really similar.
Bleach is also an amazing anime(skip the fillers) like One Piece/Naruto.
Blue Exorcist(Ao no Exorcist) is a pretty good show. It's a little slow, but it has a good story.