Oh, Halo, I just realllllllllllllllly wish you were on Pee Ess Three. Master Chief, please please please?!?! Ugh, I don't think Microsoft is listening... Well, back to Max Payne. (great game, btw.)
[updated to progress my opinion]:
I really think Halo is the 1 and only competitive FPS that DID IT RIGHT. Hands down. And this is coming from a PS3 dude.

SOOOOOO PUMPED! this sounds really fun

Show me all the blueprints.

This game could be really good! The Spartan Ops sound awesome as well!

I get stoked about this game but then get unstoked. I'm still a little ify about it to be honest. But the multiplayer still looks like a good time nonetheless.

More halo more!

now only if there was a Halo 2 remake like Halo 1.

Oh man, I couldn't get ANY MORE EXCITED for this!

My hard drive can't take all of this DLC.

Omg so awesome. 4 months to go. Should clean out my friends list and add some for halo 4.

"Career progression lets you earn new weapons and equipment" Yuck. Thanks 343. Did we ask for Cod?

I tried to click the arrows on the sides of the pictures :(

This game will be amazing!

Can't wait! One of many midnight releases this fall.

i really didnt like the assassinations from reach, or the sprint/jetpack/armor lock etc... honestly if they went back to halo 3 gameplay with new graphics and maps and a good story, i would be fine with that.

AHHHH I really want a 360 just for this. But is it too late to buy one?

I'm excited for Halo 4, but I still have too many questions about Spartan Ops to fully get behind it. 50 missions spread over 10 weeks sounds great, but does each mission have a brand new objective? Or is it like Mass Effect 3's multiplayer in which it's the same mission (survival) with different variables (location, enemy, mini-objectives)? Will we be able to replay missions once their downloaded? Can we play them offline or solo? If they think these missions are like getting a whole second campaign, then how much will the next 'season' of content cost?

I'm not griping at all, I just don't know what to think yet. I loved Firefight mode to death, and was a bit down to hear it wouldn't be in this game. However, I'm eager to see what 343 does with this new mode they've introduced.

I really think that Spartan Ops will keep people coming back to play. It's a great idea and it being free just makes it that much better. Personally, once I commit to a television series, I stick with it until the end. 343i making this into the equivalent of a television show's season is brilliant. Chances are, I'll be back every week to see what happens next.

The more I hear about this game the more excited I get.  Spartan Ops looks really interesting and the multiplayer unlocks has me really excited.

I've heard nothing about a forge mode! someone please tell me there is a forge mode!!!!!