I enjoyed Halo 4 for new enemies, the cut-scenes, a nice clean look (Halo Reach was ugly and drab), H4 was the master chief again and on his own - no noble team or blue team. Plus 343 made the pistol serviceable again for the first time in forever. In Reach, Bungie was like, "yeah we're gonna make you shoot someone five times, all with bloom." Pfft pointless weapon. I'm interested in replaying Reach again to see if my opinion has changed, but it is close to my least favorite campaign, maybe tied for Halo 5. I think Halo 5's campaign is the worst, but Reach is pretty close for me. My order would be as follows: CE > H4 > H3 and then everything else.