Well..I picked it up last night. (If I found one..I'd get it...if not..no big deal

h: ....) I didn't follow the Halo series. However I did play Halo 2 on the Xbox console. Back then, it was not a huge deal to me. Nothing spectacular jumping at me.
After popping the game in (since 98% of my XBL friends list was on it too), I was quickly invited to a coop campaign mode at the most difficult setting.
From a non fan POV:
+ graphics are nice, but I still think Gears of War is better
+ levels are epic and huge. Very very cool running around having places to hide and shoot. However, sometimes suck when you dont have a vehicle to jump into.
+ the multiplayer is great, I think this is what the game is built for. Havent tried any other multi player modes except for campaign so far.
- gameplay seems to be the same. Nothing really spectacular or anything that puts it over any other FPS's out there.
- coming from a personal view - I like playing realistic simulator FPS's such as GRAW, or R6V. This game seems to be like Unreal mixed with GRAW/RS6.
My personal review so far: (coming from a general FPS gamer)
Fun Factor: 7/10
Graphics: 8/10
Gameplay: 7/10
Replay Value: 8/10
Overall: 7/10

h:
I wouldn't say game of the year ...but coming from the general audience..it might be overall.
I had everyone but 2 on my list on Halo 3 last night.