Halo 3 days were the start of the end. Halo starting losing popularity among the masses. It was the time frame when CoD4 was released and starting pulling away population from Halo. To be honest Halo 3 wasn't even that good of a game. Halo 2 days.... Those were a whole different monster. Not only was the game awesome but it had essentially ZERO competition. The only other game that other players would occasionally play was SWBF2. Seriously, my friends list during Halo 2 was exclusively Halo 2. I would become shocked if someone was playing something else. Halo 3 on the other hand wasn't nearly the same. My friends list started to become Halo, CoD, Gears of War, etc..