Brink is all about choice. Having played the game for several hours so far this weekend, I can tell you that that methodology goes beyond which side you're on. Take a look at the trailer and you'll see what I mean.
With all of Brink's weapons, classes, body-types, attachments, perks, abilities, and... clothing you'll be able to differentiate yourself from everyone else online. Game Revolution's review of Brink will go live tomorrow.