Favorites:
Madoka Magica
Bakemonogatari
Ef A Tale of Melodies
Sayonara Zetsubou Sensei
Berserk
RahXephon
Wolf's Rain
Record of Lodoss War OVAs
Phantom Requiem For The Phantom
Macross Frontier
Adolescense of Utena
Guilty Pleasures
Highschool of the Dead
Saint Seiya (childhood fave)
Magic Knight Rayearth (another childhood fave)
And, with a handfull of exeptions, everything from Studio SHAFT
Watching
Steins;Gate
Tiger & Bunny
Mawaru Penguindrum
Usagi Drop
And a few others that are just mindless entertainment and not really worth mentioning.
Would recommend but not a favorite
Clannad
Don't get me wrong, I love the series very much, but I've never been able to completely look past omissions in the anime having to do with the ending, wich makes a heck of a lot more sense after looking into a certain game mechanic in the VN. Regardless, I wholeheartedly recommend it by always saying: "Clannad is life".