I have status on both Continental and United, but is moving from New York to Hong Kong for work.

My job requires that I fly back to the US perhaps 3-4 times a year for visits to companies around the country, so I will be flying transpac and fair amount of domestic segments. In terms of how I use miles, I almost always buy the cheapest upgradeable economy fare and try to use miles to upgrade.

I rarely fly on OW and am not familiar with the various programs... which program would be best suited for me? Should I join MPC or AAdvantage?

I did a search, but some of the information were kind of outdated and appreciate your thoughts.