Sprint for sure. I remember playing halo ce wishing I could run faster and it didn't make sense for it to be an armor ability in reach. Also the campaign. I always wanted to fly a pelican and 343 granted that wish even though it was only for 5 minutes.
In the same way one dislikes a band, I dislike Halo 4's sounds. There's not much else to say other than, "I wanted to hear X, but I heard Y."
The biggest part of my dislike comes from the guns, though. They all sound wrong to me.
Thats your opinion but 343 finally overhauled the sound in there first halo, something bungie couldnt do in there 4 halos. Every sound in halo 4 has more oomph, how is that terrible? Theres only one sound effect the extra oomph/bass ruined... The wraith plasma shot in mid air is much more silenced than previous games. I remember in the first halo alone every time a wraith would shoot, you would hear that plasma of death get closer and closer.