Amtrak is an interesting beast.
I have taken the Coast Starlight once, from Sacramento to Portland. You sleep on it, in your seat, and the Siskiyou Pass is slow going and I believe you can see Shasta. Even the cheap seats are extremely roomy.
I have taken the Pacific Surfliner once, from L.A. Union Station to San Diego. It's funny that several subway lines meet at L.A. Union and, even during rush hour, it doesn't feel crowded ... because it's L.A. and not NYC.
I have taken the Cascades once from Portland to Seattle. The price was right, the route is clean and green, and the train cars are not as tall and only 1 level.
I have taken the train from Fort Lauderdale to Tampa. I don't remember the route's name. It is said to often run late. It did. Lauderdale is next to Metrorail. A real helpful Cuban guy checked you in and a sassy Black guy was the conductor. The people were the trippiest of any train ride I've been on. A little edgier and it could have had some Jerry Springer value.
When we were kids, my parents would take us cross-country on the Amtrak Santa Fe to Chicago, followed by another train to New York. The only part I remembered was the eerieness of the Petrified Forest under thunderstorm skies and all the small bodies of water in Missouri. I was told that there would be water moccasins in there. We'd allow for 3 to 4 days in the New York area with relatives as a buffer before sailing from the city to Italy. It was done in reverse if coming the other way.
My parents were a little weird this way. (The apple didn't fall far from the tree.) Two segments on TWA or Pan Am 747s would have shaved a lot of time off this trip!
The U.S. is way behind in good train service. California High Speed Rail is way behind schedule. They are still working on the Merced-Fresno-Bakersfield segment. The Republicans hate the plan. It's always better to build these projects sooner than later. If anything, this project could further growth in California's interior since its coveted coastal metro areas are not feasible options for most people anymore. Having people trampling along the route and in those inland areas makes for a "multiplier effect."
Don't get me started on topics like this.