Having a good skill set within graphic design is a plus together with the ability to work with other members, everything else we can teach you. The time we put into it can change from day to day, one minute we have nothing to do, the next we have 10 people requesting some kind of graphic. The not knowing what will happen tomorrow is great and it is not for the fainthearted since it can be a little stressful sometimes.
One thing that is special about OS is that we don't really have a attendance requirement, we just call for a meeting when it is necessary to update the whole team about something. otherwise we use emails.