For me playing halo 3 online in a matchmaking just plan sucks, I've many times and won too but for exp I got nothing, skill is 11 but should be 20 from the skill i have in other playlists. I say that matchmaking just sucks.
It not terrible it could just use work. For instance if you look on my stats you would see that I have been killed more times by grenades than by sniper rifles, rocket launchers and even assault rifles in many cases
I never really liked the halo either by graphics or by their actions. but no place to throw a game is very famous all over the world Just that some do not like: S