Your freq flyer selection will depend on the class you purchase. Around the world is a good chance to earn more miles and a higher status, but partner airlines give you few miles per mile flown if you are in a cheaper around the world ticket. We found the upgrade to biz cost effective as we earn tons of miles. If you go coach, go with the airline that has the most flights or code share flights where they really give you a mile for each mile flown. The other flights will not earn you much...