I have done three days eastbound (EB + LSL) and four days westbound (LSL + CZ + CS) with a couple of weeks in between the trips. I enjoyed the entire train time, but I was ready to be home by the time I got back to Oregon.
I admit, I did have a couple of computer projects (not requiring Internet access, just a pair of headphones so I would not bother others) that absorbed whatever time was not spent looking out the window and/or socializing. I also had a roomette to myself the entire time, so I was able to spread my stuff out and to shut the rest of the world away when I wanted to. I also am the kind of person to jump off and take a brisk walk train-side at every daytime smoke and maintenance stop, so I did not get cabin-fever. A longer trip, and I might.
I admit, I did have a couple of computer projects (not requiring Internet access, just a pair of headphones so I would not bother others) that absorbed whatever time was not spent looking out the window and/or socializing. I also had a roomette to myself the entire time, so I was able to spread my stuff out and to shut the rest of the world away when I wanted to. I also am the kind of person to jump off and take a brisk walk train-side at every daytime smoke and maintenance stop, so I did not get cabin-fever. A longer trip, and I might.