The first time I went to Vegas, it was sensory overload. Everything was amazing. The second time, my reaction was more, “Is this all there is?” Since then I’ve been there a couple times on business trips, and comes to terms with its superficiality. You have to enjoy it as it is, and not impose the the idea that it’s some magical wonderland.
My only recommendation—time your first flight in so you get there after sunset, and have a limo booked from the airport to your hotel, and make them take you for a drive down the Strip. You really want that neon and glitter to be your first impression of the city, because Vegas is supremely ugly during the day.