For swimming on my own, I favour a single sex changing room with communal area. I get claustrophic by the lack of space, low head room, humidity and noise from many changing room set-ups and have had panic attacks in changing villages. Being functionally nude in a female environment doesn't concern me. I found it quite refreshing in Iceland where signage was quite explicit about exactly where you were supposed to pay attention to washing yourself. Much better than a costumed spray down in a mixed sex area at a British pool.
As a mother of a dyspraxic 8 yo child of the opposite sex, I need to be able to supervise him changing appropriately, not send him off into the men's and hope I'll see him again within a few hours.
The pool I favour has single sex and a family changing village set-up. Even then, it's a small number of cubicals that I can actually set foot into so far as to be able to shut the door behind me.
Curtains are far less secure than proper doors and completely inappropriate for a mixed sex village set-up. In my teenage years, I was far less confident and found nudity in a single sex changing area difficult. If an area is mixed sex, the cubicals must be secure with a good layout to make antisocial behaviour as difficult as possible.