My favorite helmet that I've used the most is definitely the Deadeye helmet. I also like the Recruit Prime, Scout, and Venator Raptor. IMO, I thought the Rogue helmet looked better in Halo 3 than it is in Halo 4. Not really a big fan of helmets with visors that take up most of the helmet.
What did you just say? Fight me irl. Do you even lift?