Pretty much what Maxim said regarding the budget. I loved watching it when as it was being released and I hope they do the same thing for every future Halo. I can understand the common gripes people have about it but I feel that there are far more pros than cons. My favorite was the Covenant reveal and the ensuing Elite stalking sequence. I felt like they captured the horror very well.
Of course I'd like a little more Spartan action but IMO the strength of FUD is in the subtleties. Like when the hacker kid showed all of the others that classified video, it was them NOT showing a full blown Spartan ass kicking scene that made it great. A Spartan hand here, some plasma flashes there, the sound of Covie weapons then, BAM, a split second glimpse of a Spartan's helmet. The Elite with the energy sword reflection was a real nice touch too.
I really, really enjoyed FUD and I can't wait to see more stuff like it.
I LOVE paying for Xbox Live! I also love that my love for it pisses off so many people.