I wasn't planning on it, but I broke down and bought ODST on day one. I figured, despite my brother's reticence to spend the cash, he'd be picking it up too, since he's 100x the Halo fan I am. Hopefully Firefight, which I have yet to try, lives up to the positive word-of-mouth surrounding it. I cooped the campaign on Legendary with my bro and some of his friends last night, and wasn't long, nor was it that challenging. I think the 4 of us cleared it in around 4.5 hours.
This morning, I went back and picked up all the audiofiles, so I have the collectables achievements. I also suffered through the Vidmaster: Classic achievement, which isn't as easy as everyone says it is. That first section sucks, but once you get beyond the first two Wraith tanks, it's managable. As I type this, I'm being a good samaritan and helping xRogue 5x get the 0 pointers in brothers in arms, while I basically sit here and type. No real effort from me, since I have everything.
Once this wraps up, I'm going to return to ODST and try to wrap up the 5 point achievements that litter the campaign, so the only thing left to do is Firefight and the Vidmasters. I'd also like to try to get a 6-person party together some time to try to boost as much as possible of the Halo 3 MP achievements in Ranked Lone-Wolves. Unless Firefight blows me away, I'll probably be pushing for all the achievements and selling ODST for as much a return as I can. Firefight may make me retract my words, but ODST just doesn't feel like a $60 value right now.
Can't complain too much about an easy 825 gamerscore so far, I suppose.