I wish they'd provided privacy curtains (and single-stall showers) in the (boys') locker rooms I was forced to use as a child. I have always hated being seen naked, not to mention that locker rooms were a favorite place for the other boys to harrass me for being not enough like everybody else, or what everybody was supposed to be like. That's on top of how gross they felt and smelled.
I still hate locker rooms.