*Much Ado*  EXCERPT: I was traveling Southwest, my favorite little airline. What makes this scrappy little discount company such a treasure, you wonder? I’ll tell you why. First, they’re just friendly. And that matters. But also, it’s because Southwest made all the right policy choices in all the right places. For starters, they don’t charge you extra for checked luggage, so as long as you pack with that policy in mind, you can kiss all that will-there-be-room-for-my-carry-on anxiety goodbye, not to mention the will-this-suitcase-fit-in-the-airport-bathroom-stall-with-me anxiety for we solo travelers. But that’s just the tip of the iceberg.