Attack on Titan (For the Spectacle)
Death Note (Because it out Spectable's AOT! and has a Rocking dub)
Digimon (Season 3 is something else entirely, dub was written primarily by Steve Blum!)
Eden of the East (Watch the show, the movies...eh)
FAIRY TAIL (Season 1 is a lot of content)
Fate/Zero
FMA (Landmark show)
FMA:Brotherhood (missing season, lesser followup to a landmark show)
Hunter X Hunter (thread would revolt if I didn't put it here...)
Kenichi: The Mightiest Disciple (would kill on Toonami at 2am)
Kill la Kill (Don't Lose Your Way)
Ouran High School Host Club (It's a gateway drug to shojo, also great dub)
Pokémon (doesn't really fit anywhere else, season 1/2 is nostalgia bait)
Princess Jellyfish (Extremely interesting premise and execution)
Psycho Pass (give it a try)
Samurai Champloo (nearly on the level of the greats)
Soul Eater (The ending might suck but this show is great)
Spice and Wolf (Even though its only season 2 this show is OUTSTANDING.)
Squid Girl (Splatoon the Show! Well Kinda. Watch it! Squid Puns!)
SWORD ART ONLINE (Lazybones approved)
TENCHI MUYO GXP (How far can a franchise fall? This far!)
Trigun (One of the all time greats)
Badlands Rumble (An entirely serviceable anime Non-Canon Movie)
Welcome to the NHK (One of the most moving shows I have ever seen in my life. Life altering)