Not sure what genres you like, but I reccommend the following:
Gakuen Mokushiroku: High School of the Dead
Last Exile: Gin`yoku no Fam
Eureka Seven Ao
Jormungand
Sakamichi no Apollon
Uchuu Kyoudai
RD Sennou Chousashitsu
King of Thorn
Karas
Mnemosyne: Mnemosyne no Musume-tachi...