Southwest is by far the best airline and from my experience last month, the best airline to work for.
My wife's sister and brother-in-law are both pilots for Southwest and once a year they have a "Spirit Party" in Vegas or somewhere else fun where they invite the entire company, something like 30,000 employees. This year my wife and I got to go to the party and it was insane. Southwest rented out all of old Vegas and booked Jefferson Starship and basically encouraged you to drink as much as possible. When I went to get a beer, they were like "Here! Have three."
When you see the employees you can totally see why it's as respected as it is.
Also scary when you think that a lot of them were pilots maybe flying you back home the next day.