Ahh, you base on multiplayer. I bade solely on campaign, and multiplayer is just extra.
And when I meant gameplay styles, I specifically meant Wars. I would love more Halo games in other genres, and maybe even another RTS.
And Wars, ODST, and Reach did add quite a bit to the series. We got more insight on the Battle of Earth and the Battle of Reach, our first times seeing Halsey, SIIIs, and Engineers outside the books, a really cool Forerunner Shield World, and plenty of great new characters.