Thanks, guys, but I’m pretty sure I know what I’ll prefer. And I do really, really want my own bathroom. 
No, people is the main reason *you *want to take the train. The main reason *I *want to take the train is scenery:
(bolding added by me just now)
I’m perfectly capable of leaving the big room to go mingle with the hoi polloi when I feel like it. 
You’ll have fun. 
Do you have a camera?
Just the one in my phone. I’ll do what I can with it.
I, like the OP, don’t want to meet people, interesting or otherwise. I want to look out the window. Fortunately, I also like looking at freight trains, because you see a lot of them.
You also get to see the back yards of everyone that lives along the track. I have determined that the people that live along the track are poor and collect A LOT of crap.
Every time I have taken the train, there is always someone who “entertains” the crowd in the lounge car by singing and playing guitar, and it’s ALWAYS City of New Orleans. I am forced to give up preferred lounge car sightseeing until they go away.
Nice setup. Ask to be on the other side of the train, because you are clearly looking at the wrong side of the tracks.