Being a good competitor is one key to winning Big Brother USA, but having a good social game is another key. You can be a great competitor and have a terrible social game and it won't get you very far. If your social game is terrible and you don't win Head of Household, you will most likely be the first one out the door. Making alliances is also important. The stronger your alliance is the better your chances of one of your alliances members winning HoH and you being safe for the week. With our Big Brother the competitors don't have to worry about if America likes them or not because America has no say in who wins.
While Big Brother USA and Australia are 2 completely different games, I enjoy the different aspects of them.