The Grass is Always Greener...
I fly 95% of my travel on CO metal and admit that I get occaisonally frustrated with frequently take for granted CO's level of quality.
Well last week I chose to fly a nonstop PIT CLT on USAir vs connecting thru EWR, CLE or IAH. Pathetic.... I won't go into details (filthy plane, uninterested gate agents, etc.) but I think every CO elite should be required to fly at least one leg a year on another carrier.
Although CO isn't perfect, compared to everything else out there, for me, it's the obvious choice.