As much as I enjoyed Halo 4, I've barely touched the Spartan Ops section of the game and, if anything, I actually sort of resent its existence. Spartan Ops essentially replaced Firefight which I loved.
Firefight, to me, was a beautiful thing. It was Halo stripped back to its absolute core. No hokey story, just the 30 seconds of fun thing, over and over again, in different situations, with different enemies. Of all the 'shooter as tower defence' mini games, I always enjoyed Halo's the most, over and above Nazi Zombies, or Gears of War's Horde mode.
Spartan Ops is about to launch into episode 8 of its 'first season' and, I have to admit, even if I'm not really bothering to play Spartan Ops, I sure as hell enjoy its trailers! They're super well produced and look incredible. The latest is no exception. I barely have context for what the hell is going, but it looks good regardless. Maybe someone could take the time to explain it to me!