I've been on a serious binge since I quit my job, aside from picking up job applications, I have been watching anime all day while playing Skies of Arcadia: Legends - I think I'm just trying to fit in as much anime as I can before I have to work again. I just finished Persona 4: The Animation. It was ok. Some of it was pretty interesting, but I didn't like the action style very much. It just wasn't satisfying. I have not played the game, but I can only imagine it's action is better than the animation.
I think now, I'm going to start... probably Fate / Zero or Fate / Stay Night ... I may do Zero first, since chronologically it makes sense, even if it came out later.
It's that or the Monogatari series... two reasonably good sized series, they both seem somewhat interesting, probably Fate moreso... They have both been on my list for a while and I never got around to watching them. Hmm.
I'll go Fate.