As I recall, Roddenberry had to fight for the crew to have individual quarters...the NBC execs wanted to show mass "bunks" for the lower ranking members of the crew as that more closely parallels what happens in the military. Roddenberry thought people deserved a space to call their own.
Sadly, due to budget restraints, the rooms tended to all look exactly the same. At least, in the new movie, it would be nice if there were different bed spreads....though, didn't Uhura have a pretty fluffy set of quarters? At least, she did when Elaan of Troyius got to use them....
Thanks to Ron Salon for the signature banner!