Catman: Meow! What you say about multiple memberships makes great sense. If you've found something you like, stay with it, but always make sure you have a back-up. I've been a Delta user for 30 or more years but have become disillusioned and have tried other lines in recent months. None have measured up. I was the absolute first United ff in the DC area to have to PAY for membership in the Red Carpet Club. The point: You're going to have an airline that you like, in spite of the occasional drawback (Delta happens to be mine), but you also need to be able to take advantage of other programs when #1 can't or won't come through.