some of my best ever train rides were in full width compartments - going home in the evening, at twilight on a mild summer's day with the windows open wide as the train travelled at 70+mph through London's suburbs
it was even better if one of the light bulbs were not working, as I could see even more clearly though the open windows.
All history - Class 307's no longer exist and the Class 345s have lights so bright that the reflections mean one can barely see out. Oh and they stop at all stations, whereas the 307's generally missed out most stations.