I'm very much in the love Halo Universe/Story camp. Hoping the next in the Halo PF series is an Arbiter. I didn't love Halo 2 (it was clearly incomplete, and Bungie admitted to it later on), but I did love the direction they took the story and really thought it gave a certain human essence to the Covenant's religious war.
Yeah, I loved Halo 1-3's story. But with the contradictions with Reach and the story of 4, I just am not impressed.