Hmmm too many to even list here but here's some of them.
The titles that have an * are the good ones

Yu Yu Hakusho*
Dragon Ball Z*
Hunter X Hunter (both 1999 and 2011 and the OVA's and movies)*
Code Geass*
Darker than black*
Flame of Recca
Get Backers*
Gatekeepers*
Rurouni Kenshin*
Shakugan no Shana
Tokyo ESP*
Afro Samurai
InuYasha
RaVe*
Claymore
El Hazard
Gensomaden Saiyuki/Saiyuki Gaiden (all seasons)*
Neon Genesis Evangelion*
FullMetal Alchemist: Brotherhood (it's better to watch brotherhood than the first one imo but its up to you)*
Fushigi Yuugi*
Gantz*
Gatekeepers*
Ghost in the Shell (all seasons and versions and movies)*
Gintama
Hero Tales
KINGDOM (both seasons)*
ikkitousen (uptoyou)
Wolf's Rain*
Kill La Kill
Knights of Sidonia*
Log Horizon*
Machine-Doll wa Kizutsukanai*
Magi: The labyrinth of magic
Hitsugi no Chaika
Nabari no ou
Nadia: Secret of Blue Water*
Ninja Scroll (movie)*
NoraGami*
Saint Seiya*
All Sailormoon (LOL)
Shaman King*
Shin Hakkenden*
Shura no toki*
Trigun*
Triage X*
Tsubasa Chronicles (all seasons, ova's and movies)*
Yu Gi Oh! (start with first season imo thats the only season that's great)*
Zenki*
Weiss Kreuz
Vandread (both seasons)*
And Last But Not The Least.....   Boku No Pico!

Enjoy