How about "any airline on which I can get a jumpseat to DFW or PHX on!"
Some days, it's America West, but last week it was American. Even put me up in first class, offered me warm pistachios and a chicken quesadilla! And let me put my bag into the front closet!
If I flew my own airline to work, well, my connection carrier, it would be a bag of pretzels, half a can of a "coke-type product" and a few minutes of a game of "Warcraft III" until the passenger in front of me reclines his seat and crushes my laptop monitor at an angle that I can't see the screen.