Hi Dave,

I'm no expert on AAdvantage, but my initial thought is if you've already got 50,000 miles in your account, and Gold Status, then I'd continue to add to that, particularly with the upcoming trips you mention.

By my reckoning your upcoming trips won't be enough to retain AA Gold or attain AA Plat, but at least if there are other trips that come up you are well on the way.

I can't see any benefit in joining another Oneworld carrier's program, as you'll then be dividing up your earning and status potential.

Besides, general consensus on FlyerTalk seems to be that of all the Oneworld programs, AAdvantage is the best in terms of ease of earning miles and status, and better value redemptions. I'd stick with what you know.

Hope that helps.