It's not the candidates' job at OCS to screen out other candidates. That's the staff's job. You may have your own ideas of what qualities make a good officer. The staff might have their own. Let them decide who the shitbags are, and who the hotshots are. While you are a candidate, you are training alongside other candidates. Be a team player, know when to help and when to ask for help, and remember that you'll be meeting many of these guys again in the future, so try to build bridges, not burn them. Try to become the guy that everybody wants to go to war with.