What's interesting is that at Spirit, their new(ish) CEO Robert Fornaro -- who used to run AirTran -- is trying to make that airline more "normal." I'd call it a sober and traditional approach to running an airline. At the same time, Frontier is truly trying to be a "whole different animal," by doing things that other airlines don't do, and what seem at first glance to maybe be bad ideas. I've always thought that operating flights on what seem to be random days and constantly changing your city pairs would be a path to airline bankruptcy. But that hasn't happened, at least not yet.