Yeah, I have to agree, multiplayer got old after all the kids joined in Halo 3. And that's what I meant. ODST was a let down. I thought it was going to be more like Splinter Cell / Solid Snake where you creeped around and silently killed elites and if you got into a firefight, you didn't have much of a chance of survival. Nope...it was a run-and-gun like the others.
Reach was decent enough, but I hate prequels that come after a series. Look at Star Wars Episodes 1-3 for a good example of that.
Although, I'm hoping 4 will tap into the stories in the books a little more. A friend and I, after finishing Halo 3, was thinking the planet that MC and Cortana were heading to was Onyx. The abandoned planet where they trained the Spartans I and IIs. And there are Spartan IIIs, that are badass, but not as badass as the Spartan IIs, but a lot more of them.
Eh...here's to hoping.