My first time was back in '90. I was 19 and on my way to Europe for a study term in Italy. My dad figured he'd escort me over there and take care of some business at the same time. Since PanAm was about to go under (for the first time) he decided to blow all his frequent flyer miles on first. Boy, were my eyes as big as saucers! The caviar, the champagne, chocolates, edible food, comfy seats. I was in heaven.
Alas, I was so smitten with the ride that I did not sleep. Upon arrival in Paris, I met up with a friend from school and we were dropped off at the Gare du Nord for our train to Amsterdam. Being somewhat groggy and very tardy, we sprinted for the train and managed to board as it was pulling away. Of course, we had about 1000% more luggage than I carry now. Once settled, we breathed a sigh of relief - until the conductor told us that the car we were seated in only went to Brussels. What a fire drill we had at the next station trying to change cars (for some reason the doors were locked between cars). By the time we reached Amsterdam I felt like death. Slept forever.
But I learned some valuable lessons: First is better

, sleep on the plane, travel light and mind all signs and placards!