Ok, really enjoying Halo 4, completed the Campaign on Legendary found it the toughest Halo game so far. One thing that is seriously bugging me (and it's such a small thing really) is the Warthog sounds like it has had a downgrade to a 50cc moped engine! Still drives the same but even so I just imagine eco-warriors campaigning for a better carbon footprint on UNSC vehicles!!
I'm probably alone in this, but I bet next time you all play you will notice it!!! :D