Best airlines?

Well, we traveled on Airtran in August. The planes were nice as were the crew. They also have some of the cheapest airfare. My gripe was that we barely had time to get to our next plane during our stopovers. Also, it's a shame they can't offer any real food for a flight that's over 4 hours long. Guess bringing your lunch is the new norm. I've also flown on Northwest before and they were OK.