I have flown a few airlines, mostly international, but my first flight using Southwest Airlines was from Houston to Dallas.  I love Southwest's boarding system.  The sooner you check in, the better chance you have of getting a good seat.

Their flight attendants are so nice and funny!  All our questions were answered nicely and their service was great.  I couldn't believe how polite the flight attendants were.  They greeted us onto the plane and helped me with my carry on.  During the flight, the attendants made sure we were doing okay.

 I will be flying Southwest whenever it's available to...