lol...Unlike most airports you will ever attend simply due to the fact that as soon as you walk off the plane, what do you see....slot machines? lmao.
Other than that McCarran is not so different than most airports. Good places to catch some eats before your flight, TSA works well here (but I guess depending on the airline), the shuttle service however could be a little bit more well prepared as their was slight confusion of where the driver was suppose to be going to first to drop off passengers. If you do come to Vegas through McCarran just play a slot machine or two for fun. It's a funny experience while there.