Code Geass <-- best i've ever seen, very serious, very exciting, a little romance and comedy, 50 episodes.
Ao No Exorcist <-- very good, serious, some comedy and romance 25 episodes total.
Sword Art Online <-- very good, serious, romance, comedy 25 episodes + 7 additional in season 2.
Code Breaker <-- very good, serious and very good for only being 13 episodes.
fullmetal alchemist: Brotherhood <-- very good, serious, thrilling, comedy only 64 episodes i think.
Kyoukai No Kanata <-- pretty good, serious & romance... good quality and such, 13 episodes
Akame Ga Kill <-- very good so far, new, 2014, serious, killing, ONGIONG, at episode ~10
Code Geass: Lelouch of the Rebellion
Fullmetal Alchemist: Brotherhood
Sword Art Online
Ao No Exorcist
Code Breaker
those 4 are "must watch" animes that is "finished" with less than 65 episodes. the others are only decent.