Favorite Airlines
Domestic US - Continental
US-Europe - Continental
US-Asia - Continental & ANA
I fly frequently for work (usually in the summer), and must fly on the cheap.
USAir is the worst in the US, I think. I live in Philly and often fly out of Newark to prevent them from handling my luggage. I like Continental because they have direct flights to the places that I want to go. I book early at low prices and then snag the aisle seats (emergency exit seats 24 hours before online) I can usually get a 777 to Asia or Europe, although this summer CO flew 757s to/from Belfast. It was not as bad as I thought it would be.
I've had mediocre experiences on other US airlines. The only thing I like about United is Channel 9.