re: What airline do you fly and why?

Spirit = trash
Southwest has a nice checked bag deal, but there’s only one class, the boarding situation is weird, and it’s like they’re herding cattle.
United seems generic, just gets you there.
American is decent all around.
IMO, Delta is far ahead of the others - nice aircrafts, nice classes, great service etc. I hate flying anything else except them, just personal preference.