i only got to play halo 3 for one weekend when i was house-sitting for my sister...
my brother in law has an xbox 360 and live connection, so i just rented halo 3, put on the headset and played until like 5 am for the whole weekend.. it was pretty sweet.
i used to be an uber noob with halo, but in that one weekend, i became pretty good at it.
my favourites: shotty snipes and swords on the guardian. i owned hardcore.
juggernaut was hilarious too xD
-cough-