I have flown in a couple of airlines and by far Delta has the friendliest and most helpful staff. I choose to fly with them every time even if their seats arent as spacious as Jet Blue (another favorite) Last month when I flew with them I arrived late to check in (my fault -i'm not from new york and their traffic is killer - still my fault i was late) anyway.. They allowed me to take my luggage through security and they checked it in at the gate and they were very helpful and got me through the speedy security screeening. On the flight home to Vegas they moved me to the economy comfort seat and was treated to free alcoholic drinks cause the card swiper wasnt working. I dont get free stuff all the time but they are always very calm and dont yell or scorn you and they look for solutions to help you out.