I think my current Winter 11 favs would have to be Zombie Desu, Yumekui Merry (See: My avatar), Fractale, Mitsudomoe, and Level E. And maybe Wandering Son, but I need to catch up. Also Gosick, but I need to catch up with that too.
How is Level E and Gosick by the way. I haven't watched either of them. Another really good Series is Puella Magi Madoka Magica.