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
People who put lol infront of something honestly are immature. I understand if you dont like something, but putting "lol" infront of it doesn't help your case, and more or less, makes you look like a tool.
...and someone is going to respond to this by putting "lol" because they are so original and funny.