Let me see... Cowboy Bebop, Outlaw Star, Full Metal Alchemist, DNAngel, Saiyuki, Witch Hunter Robin, Spice And Wolf, Weiss Kreuz, Serial Experiments Lain, Paranoia Agent, Ghost in the Shell, I'm getting into Puella Magi Madoka Magica (for those that haven't heard of it, think Sailor Moon with the safeties off. Blood, gore, Anybody Can Die [and messily], and the fights are fucking acid trips) wicked fierce, I'm really getting a kick out of the Persona anime...
And anything Miyazaki is exquisite.
That's pretty much my list.
Edit: I forgot about the Gundam series... Wing was my first love. Cultural Catgirl Nuku Nuku too, along with Hyper Police!