This is an interesting thread, that could be titled "Any airline vs any airline", however, Stephen Stills, the folk singer, way back in 1970, had the right idea when he sang these words: "If you can't be with the one you love, honey, love the one you're with." SWA, FedEx, DAL, all are really good gigs. If you work at one of them, count your lucky stars and plan well for your retirement. If you have fun along the way, even better, but remember, work is a four letter word. If you're young and have no spouse and/or kids, enjoy yourself now, but after you've married and have a family, it'll be all about providing for them, first, last, and foremost. You really don't know how your airline career will be until after you're retired for a few years and look back.
JJ