Full Metal Alchemist (51 episodes)
Full Metal Alchemist Brotherhood (Ongoing series, currently on 54)
Cowboy Bebop (26 episodes)
Deathnote (37 episodes)
Neon Genesis Evangelion (I think it's 26)
Samurai Champloo (26 episodes, but I haven't finished it)
And if it counts, The Boondocks (Currently 30 episodes, but the next and final season starts on May 2nd)