This was a nonstop flight from Fort Lauderdale to Austin, TX. My flight was late due to weather up north. Southwest kept me informed by text and at the gate. Check-in at FLL was quick and easy, because SW has enough kiosks to handle a heavy passenger load. I was flying on Christmas Eve, and the airport was crowded, but things went smoothly, thanks to the efficiency of SW staff. It also helped to have TSA Pre-Check. I enjoyed being able to upgrade my seat assignment at the gate for a reasonable fee. The flight itself was one of the best I've had on SW. This was due in large part to the Captain, Mark. He came out of the cockpit and greeted each passenger with a smile and a handshake. I've never had that experience before. His ease was infectious. I knew I was in good hands for the flight. Having a personable and very competent crew is the hallmark of a SW flight. This is why I always fly SW.