I was going to shoot for Plat again but instead will probably stop at Gold. After that I'm moving over to AA, hopefully with a challenge. Will open a US Airways and AA credit card, that's 90K miles when the programs combine, and spend next year racking up AA miles the old school way until they too follow DL and UA. Then it's whoever will provide me the best value for the money, be it via schedule, price, service, etc. Loyalty is obviously a thing of the past.