I think Sonic is a manga. Ninja Turtles.... i don't think so.
Let's see, i've also got many favorites, i'll just watch at what i've got here with me:
Samurai X
Dragonball, Dragonball Z, Dragonball GT
Ghost in the Shell
AKira
Appleseed
Cowboy Bebop
Porco Rosso
Van Helsing
Final Fantasy
Blood the Last Vampire
Yu-Gi-Oh
Chobits
Steam Boy
Spirited Away
....and many more
