Halo 2 because I feel it took more skill to effectively use the button combinations because they added a whole new aspect to the game, and because it was so easy to 4 shot people with a BR you had to have your team help you a lot... Halo 1 takes a lot of skill, and was extremely fun and I would love to get an 8 person LAN going on for H1. That would be one of the most fun nights of Halo ever....

And Halo 3...... just sucks.