This is a very strong season to be sure. For me, Fall 2003 is my personal favorite strongest season since I'm also a huge NASA fan and having two space anime at the same time was a dream. Fuck me but I did not sleep much that semester and my grades..
Fullmetal Alchemist
Chrono Crusade
PLANETES
Twin Spica
Gunslinger Girl
Gungrave
Tsukihime (flawed but had potential and style)
KGNE
Chromarte High School
Bobobo-bo Bo-bobo
ROD TV
Ai Yori Aoshi Enishi
Peace Maker Kurogame
Gilgamesh
Requim from Darkness
Saiyuki Reload
Galaxy Railways
Continuing from previous seasons: * Naruto
One Piece
Inuyasha
Price of Tennis
Kaleido Star
Da Capo