I use to go back and play H3 when Reach was still current. Now I don't even go back and play Reach, it's H4 or nothing for me right now.
I never really got into MP Halo 3, I didn't have money for a console or internet for a good portion of it's life cycle so my stats are LOL worthy (playing 4 player split screen against people online SUCKS!).
They call me Spoke Wrecker... Thizz iz what it iz GT-Spidux
Halo 3 was the let down of the trilogy to me. Don't get me wrong, the online game play was fun. I loved being able to play as elites and the levels were the best imo. Avalanche should be brought back! Especially since the levels in Halo 4 are NOT large enough for vehicles like Halo 3 levels where. I have played many games in Halo 4 where people completely forgo the vehicles.
But the story in Halo 3 really let me down. We no longer got to see dueling perspectives on the events of the games. The Arbiter was reduced to laughable sidekick. Going from the voice actor of the Prophet of Truth between 2 and 3 gave me a whiplash. The killing off of characters like Keys did not add anything except plot holes. Leaving me asking, Why? Why did she go by herself? Why not send a group of troops to do that with or instead of her? Or what about all the hornets outside where she was? If flying through the window with a ship was always an option why not have the chief do it? The game also felt very rushed through to me and could have used a few more levels.
I really liked 3 but to go back and play it now it's sooooo slow. I couldn't really readjust after playing Reach. I don't think I even like 4 as much as I liked 2 and 3, but it's just really hard to go back to something that's so slow. And 4 is still good.
I still go back every now and then. I like the playlists better the map flow, and the weapon/vehicle selection. The only downside is that usually the people playing are the super hardcore players who have been playing since release. But I still regularly have more fun during a match of Halo 3 than Reach or 4.