For the single player campaign, I want to see more impressive scripted events a la COD4 and Gears. I also want to see more epic boss battles.
For multiplayer, I want them to add some more depth and rewards. Give us some incentives to level up rather than just a badge by your gamer tag. I'm not suggesting they rip off COD's perk system because I know Bungie is creative enough to come up with their own ideas but please give us something to play towards. As far as gameplay, I want the ability to run and aim down sights. I know Halo players love the weapon pickup system but maybe add some alternate playlists where we can customize our loadouts.







