You never know, or at least I never knew, what exactly you're going to find inside when you climb into a European rail car. There are so many different types of cars, some sleek and modern and some that can only be described as quaint. I think my first leg to Paris was the only train I used in Europe with old-school fabric curtains, both at the window, and also at the door of the compartment.
Thr compartment configuration was cute, cozy, and womblike, at least until a group of five business travelers got on and took over the rest of my compartment. I spent the rest of that leg feeling very much out of place and in the way; I definitely prefer "airline style" seating. New Jersey Transit has some trains where, for groups, airline can be converted to face-to-face just by pushing on the padded bench back; this is the one thing NJT does right.
This train/route was EuroCity 296, the "Jean Monnet," which took me from Basel to Strasbourg. At Strasbourg I transferred to the sleek and modern high-speed TGV train, where I forgot that seats are actually individually reserved. This was how I found out, shortly thereafter, that nobody does bitchface like French girls do bitchface.