Depends on what your interest are, Fate/Zero has quite a bit of action and is really good(haven't finished it yet.) If you like the Magical Girl kind Tokyo Mew Mew is a good one along with Madoka Magica(puts a dark spin on the genre.) Noragami is another good one, SAO is pretty good(a lot of people disagree) Rosario + Vampire, Vampire Knight, Heaven's Lost Property is a funny one, Infinite Stratos, FMA Brotherhood, Akama Ga Kill, and Fairy Tail. Those are what I can think of off the top of my head. [spoiler]Fate/Zero Tokyo Mew Mew Madoka Magica Noragami SAO Rosario + Vampire Vampire Knight Heaven's Lost Property Infinite Stratos FMA Brotherhood Akame Ga Kill Fairy Tail[/spoiler] Tl;dr spoiler!