Having done an adequate amount of traveling with different airlines, I would have to say US Airways is my least favorite. I just don't understand why they don't feed me? It was a six hour flight, an not even a snack? Madness.
More regarding the airlines though, Their stewards are not as cheerful or nice as others...and they mess up everything. Forget your flight leaving on time or having your baggage when you get there. They had three chances to get it right, and struck out every time. Rebooked me on another airlines' flight that was already overbooked and then wouldn't help us get on a new flight because they had "turned us over", come on!