You knwo what I think that I have seen way too many obscure titles:
6: Sadamitsu the Destroyer: Sadamitsu, is a high-school delinquent turned masked-hero who fights excaped alien criminals and sends them back to space. Horridly simple plot turns Epic Storyline.
5: Soul Taker: This is not Soul Eater, this is about Kyosuke Date who was killed by his mother, ressurected, and unburries by a twin sister he never knew about... and the power that come with being something more than human.
4: Detroit Metal City: The band Detroit Metal City which is fronted by Sôichi Negishi who takes on the stage name Krauser II. On stage he is a wild-unchained beast. Off-stage he is a tranquil, tender-loving person who enjoys Swedish Pop music.
3: Darker than Black: Following Hei, a 'contractor' with the ability to control electricity and his exploits as a black operative in a future that is forming an underground war with super powerful humans.
2: Phantom Requium for the Phantom: Follows the exploits of the Phantom Assassins Ein, Zwei and Dri in the organization of Inferno. Shows a relativly realistic show that is amazingly well played out.
1: Ichiban Ushiro no Daimaou: The only one on my favorites that I can't pronounce... and my god is it amazing. So in a good ol' happy magic based society, we get our hero Akuto Sai who wants to change the world for the better of all mankind. First day of school he gets to see his future occupation which turns out to be Demon Lord. Things escalate from there untill Sai actually decides to KILL GOD. You read that right... and this show has actually made a friend of mine sit through and watch every episode subed (and he can not stand watching subed stuff ever), it is that amazing