Meh, I totally prefer the COD style to Halo (even though I love both). I just love the fluidity and the responsiveness in the movement, I love ADS, low health/high damage weapons, etc... but the one thing I can't stand is the knifing. Everyone uses it as a first resort. The game mechanic should be like in BFBC or Counterstrike or whatever. Your character should actually have to take out the knife before he stabs, rather than 1 button = 1 stab. It's unrealistic and takes away the intensity from CQC gameplay, IMO. I don't care about noobtoobs, ACR's, SCAR-H's, shotgun secondary's - I just wish they'd patch the knives.
And fucking Commando.