I'm an original gangster Halo2 fan so I have to say: 1- Waterworks 2- Relic (Come on, those CTF battles were insane when you had a good wheelman) 3- Headlong. Loved the return of Headlong in Reach but nobody bought the DLC much at that point it seemed... they waited too long to release it to fully utilize it's BTB Objective design. I heard a rumour about Waterworks in Halo4 though... we can only hope...