Kekkaishi(though you'll have to read the manga for the complete ending)
Attack on Titan(again you'll have to read thea manga...or wait years for a possible 2nd season
Yu-Yu-Hakusho
Ruroni Kenshin
G gundam
Death Note
Wolf Rain
Persona: Trinity Souls....not a great job of representing persona..but as a very deep and drawn out story
Evangelion(the recent one along with 1.11-3.33 movies)
Hajime no Ippo
Samurai Champloo
Samurai 7
Deadman Wonderland(again you'll have to read the manga to see the ending
Gantz....very gory and yet again you'll have to read the manga to see how this ends
Code Geass
Cyborg 009
Blassreiter
and just for kicks...if you're looking to laugh your ass off just watch Gintama; will also test your knowledge of Anime/Manga
EDIT: and for some kickass movies try Karas: The Prophect and Karas: The Revalation
