Hey guys, I have friends at both and to be honest I'd seriously consider AirTran. They've already gone through the growing pains (good and bad) Jetblue is now seeing. Too much uncertainty with JetBlue right now. AirTran is a much better bet. Only way to know is to look back after your retirement party (hopefully) and evaluate then.
Either way lots of guys would love to be in your position, consider yourself blessed.