Suggestions on more anime to watch

Considering the following animes I have already watched with the ones in RED been the ones I liked the most.

 Spoiler

Anime	Rate
Baccano! + Specials	5
Code Geass	5
Code Geass R2	5
Cowboy Bebop	5
Durarara!!	5
FLCL	5
Gunbuster+Diebuster	5
Haruhi Suzumiya no Yuutsu	5
Higurashi no Naku Koro Ni	5
Higurashi no Naku Koro Ni Kai	5
Kaiba	5
Kara no Kyoukai	5
Mushishi	5
Neon Genesis Evangelion	5
Panty and Stocking	5
Sayonara Zetsubou Sensei	5
Sayonara Zetsubou Sensei - Zoku	5
Azumanga Daioh	4
Bakemonogatari	4
Black Lagoon	4
Boogiepop Phantom	4
Death Note	4
Escaflowne	4
Full Metal Alchemist Brotherhood	4
Ga Rei Zero	4
Haruhi Suzumiya - Season 2	4
Higashi no Eden	4
Love Hina	4
Lucky Star	4
Mononoke	4
Paranoia Agent	4
Phantom ~Requiem for the Phantom~	4
Samurai Champloo	4
Silent Möbius	4
Spice and Wolf	4
Spice and Wolf 2	4
Trigun	4
.Hack//Sign	3
Black Cat	3
Blood+	3
Elfen Lied	3
Eureka 7	3
Great Teacher Onizuka	3
Hellsing TV	3
Mnemosyne	3
Puni Puni Poemi	3
Shakugan no Shana	3
Tengen Toppa Gurren Lagann	3
This Ugly Yet Beautiful World	3
Wolf's Rain	3
Blue Seed	2
Bokusatsu Tenshi Dokuro-Chan	2
Cromartie High School	2
Magical Pokaan	2
Oruchuban Ebichu	1

I don't really care that much what style it is.

The bigger points in choosing an anime for me are, in order of importance:
-It is good and original, overused themes and stories are not nice.
-It should not be far too long, at MOST 50 episodes unless it's pineappleing godly (FMA:B for example).
-Preferably it should have finished airing already.