I <3 Halo:Reach - amazingly fun and best campaign + amazing Soundtrack
I <3 Halo 3:ODST - best soundtrack + Firefight + Coastal Highway and Mombassa Streets, amazingly unique campaign.
I <3 Halo 3 - best multiplayer levels + Forge + best Custom Games + soundtrack
I <3 Halo 2 - amazing huge fun campaign + soundtrack + Fun multiplayer
I <3 Halo: CE - started it all
I follow alot of Bungie employees, and they tweeted about it, saying it was good, but it has elements that didnt feel right.
Marcus Lehto said that campaign was great, but it had too many COD elements in it that weren't needed.
So they are like the rest of us.