I've seen these shows, so far:
-Suzumiya Haruhi: I don't need to add more comments, everyone here already knows how amazing this animation is. And I totally HATE Haruhi
-Utawarerumono: Never played the original PC game. I love the storyline and the characters, though some of them seem to be ripoffs of SNK characters with fluffly ears (Eruru = Nakoruru, Benawi = Ukyo, etc.). Chapter 11 was released some days ago, and it made me cry deeply ;(
-Deus Machina Demonbane: Not the biggest thing ever done, but I liked it. I became interested in the Demonbane concept when I downloaded some CG pictures of the original H game. Kurow + Alu combo is hilarious sometimes.
-Fate/Stay Night: Just finished watching it. It was love at first sight (I like anything that comes from Typemoon), the battles were all amazing (we'll never forget you, Archer and Lancer ;____; ), the music and the plot were superb, too... and yes, Sakura chan :3