Some between many:
1) The trio Cat's Eye - City Hunter - Angel Heart (Tsukasa Hojo rules!)
2) Saint Seiya (but the best are sanctuary chapter and Asgard chapter)
3) Fruits Basket, big fan of Kyô ('cause reminds me one of my cats
!!!)
4) Yu Yu Hakushô, Yûsuke and Kuwabara are the best!
5) Death Note surprised me a lot! Very good stuff
6) Witch Hunter Robin, very good too!
7) Captain Tsubasa, with their famous flying net destructor soccer's aces!
8) Kimagura Orange Road,
Madoka when I was the same age as Kyosuke
And in anime movies:
1) all the Miyazaki
2) all the Satoshi Kon
3) Kenshin's OAV, nice prettier than the serie
Well, a good list I believe...