I have 26 years of train-riding experience.John M. Chase/ShutterstockI've been riding trains across the US for 26 years, and it's one of my favorite ways to travel.After hundreds of trips, I have a running list of some of the worst tendencies passengers have.Bringing too much luggage or generally taking up more than your fair share of space is annoying.Train travel can be an adventure.Whizzing by different terrain and meeting new people are all part of it.