There's really so much to do, that it's overwhelming sometime. Some of my favorites are races though. I love racing against my friends, especially with agreed upon rules, like trying not to wipe each other out. Then whoever is the fastest is the winner, and it can be really fun. There's also brawling with your friends that can be quite fun. Fighting it out in CQC with fists or bats can be hilarious. And finally, helicopter/air battles. Trying to take each other out with helicopters, but not even with the guns, just the blades, can be super fun and entertaining.