Its a petty simple system. Down at the bungie labs there are millions of hamsters running on wheels. Each player is assigned a hamster. If your hamster runs faster than all the other hamsters in the party, you rank up. If its the slowest, you rank down. Even if you won. The cutest hamster gets MVP.- Some random BNet person.
I voted Buck, I love his character already, but he seems to be the one that I think will die, although I don't want him to. My second choice would be Micky.