Human is actually less adaptable psychologically than we like to think. Today's society and lifestyle, for example, is causing us all sorts of stress-related problems and illnesses that most of us don't even realise. Living for years confined into narrow corridors and quarters could easily cause all sorts of psychological and psychosocial problems.
I'm going on my own experience here, but there are only few things people can't do - for example, live in narrow spaces in regular *random* stress situations. If these situations are predicated, well managed and people just know what to do and how to deal with them, it becomes non-problem. Also having actual plan and someone in charge works. Good management skills for leadership cut down stress considerably, be it space station or submarine. It is clear that stations should have some really nice large open spaces for crews to relax. Be it stars gallery, hologram forest or anything else.
Also for this I'm actually quite interested in legend how we would explain rather quick communications we have. Some sci-fi universes uses term "hyperspace transmitters". Having actually possibility to connect with someone else also deals with stress considerably.