Well, some people out there like us, my last 3 day trip was full everyday. (And no complaints that I heard)
And what makes you think that a full plane means that it is full of people who like US Airways?
Last we I had no choice but to fly on US - not because I chose too but because the fare was less than half of what the competition (United & Continental) was charging. I certainly didn't fly on US because I like the airline - and in fact avoid it whenever there is a reasonable way to do.