I travel mostly in coach. I spend probably half in my seat and half in the cafe. I do quite a bit of moving back and forth as I don't like sitting still for long periods, that's what I love about the train. Never once have I been told to stay put. I also like to walk the length of the train (as allowable) after big stops, to check out the newly boarded passengers. I am one of those who, despite long odds against it, is always hoping to run into someone I know, out of context, so to speak. I get off at (almost) all smoke stops (not to smoke, but to walk and breathe local air).
I read a lot, and often prefer the cafe for that, because I get more scenery as well, and I like to lay the book flat on the table. I also really enjoy meeting people who want to converse, but won't force it upon anyone - if one comment doesn't get a friendly response, I let it go immediately.
When I have been fortunate enough to have a roomette (CZ RT twice, and EB RT once) I do most of my reading in the roomette, but really enjoy the diner and cafe as well. I do try to be sensitive to crowded conditions in SSL cars, to give others a turn.
And it's always fun to go to the cafe for a beer sometime around 4 or 5 pm - usually a friendly gang in there then.
With all this activity on my part, time passes nicely and the train ride rarely seems too long - practically never in a roomette, and only in coach at about 3 am when I can't sleep.